EP1695024A1 - Pyrotechnical connection provided with separable parts and a launcher comprising at least one such connection - Google Patents

Pyrotechnical connection provided with separable parts and a launcher comprising at least one such connection

Info

Publication number
EP1695024A1
EP1695024A1 EP04805787A EP04805787A EP1695024A1 EP 1695024 A1 EP1695024 A1 EP 1695024A1 EP 04805787 A EP04805787 A EP 04805787A EP 04805787 A EP04805787 A EP 04805787A EP 1695024 A1 EP1695024 A1 EP 1695024A1
Authority
EP
European Patent Office
Prior art keywords
pyrotechnic
main structure
connection
parts
weakened section
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.)
Granted
Application number
EP04805787A
Other languages
German (de)
French (fr)
Other versions
EP1695024B1 (en
Inventor
Guy Bonnet
Jean Langlois
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.)
ArianeGroup SAS
Original Assignee
EADS Space Transportation SA
Astrium SAS
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 EADS Space Transportation SA, Astrium SAS filed Critical EADS Space Transportation SA
Publication of EP1695024A1 publication Critical patent/EP1695024A1/en
Application granted granted Critical
Publication of EP1695024B1 publication Critical patent/EP1695024B1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B15/00—Self-propelled projectiles or missiles, e.g. rockets; Guided missiles
    • F42B15/36—Means for interconnecting rocket-motor and body section; Multi-stage connectors; Disconnecting means

Definitions

  • the present invention relates generally to the field of pyrotechnic fittings, and more particularly to that of pyrotechnic fittings with two separable parts comprising a first pyrotechnic line provided with a first line end, as well as a second pyrotechnic line provided a second end of line.
  • a connection is capable of being used in any pyrotechnic system, and more specifically adapted to be interposed between any two entities intended to be separated from each other following the transmission of a pyrotechnic order between the two lines.
  • this type of connection can be arranged between two different stages of a launcher, or between a releasable element and any other element of this same launcher.
  • the invention also relates to a launcher comprising at least one such pyrotechnic connection.
  • the invention also finds applications in the field of pyrotechnic systems fitted to aircraft or helicopters.
  • STATE OF THE PRIOR ART pyrotechnic connections have been proposed with separable parts, for example such as that described in document FR-A-2 470 757.
  • the two distinct parts of the fitting are nested one inside the other so that the two pyrotechnic lines associated with these two parts are opposite one another, with the obvious aim of ensuring a correct transmission of a pyrotechnic order from one to the other of these lines.
  • these two parts are respectively assembled individually on two separate annexed elements intended to be separated.
  • the object of the invention is therefore to propose a pyrotechnic connection with dissociable parts comprising a first pyrotechnic line provided with a first line end, as well as a second pyrotechnic line provided with a second line end, the connector at least partially remedying the drawbacks mentioned above relating to the embodiments of the prior art.
  • the invention aims to present a launcher comprising at least one such pyrotechnic connection.
  • the invention firstly relates to a pyrotechnic connection with separable parts comprising a first pyrotechnic line provided with a first line end, as well as a second pyrotechnic line provided with a second line end.
  • this pyrotechnic connection has a main structure comprising: - a first part and a second part respectively equipped with the first and second pyrotechnic lines, the first and second parts being integral with one another and capable of being dissociated during a transmission of a pyrotechnic order of to each other of the first and second pyrotechnic lines; - a weakened section integral on the one hand with the first part and on the other hand with the second part; and - a through passage extending through the weakened section as well as through the first and second parts, the first and second line ends of the pyrotechnic lines being arranged opposite inside the through passage.
  • the first and second line ends of the pyrotechnic lines are each provided with a protective envelope capable of being deformed during the transmission of the pyrotechnic order, in order to cause a break in the weakened section of the main structure.
  • the connector according to the invention is designed such that the two parts of the main structure are integral with one another before the transmission of the pyrotechnic order causing their dissociation, and not only inserted one in the other as was the case in the realization of the prior art presented above. Consequently, a rigid mechanical connection being provided between the two parts of the main structure, it is no longer necessary to provide complex means for fixing these parts to the ancillary elements in order to be able to ensure the desired cooperation between the two ends of line.
  • the rupture of the weakened section is advantageously effected by using elements constituting the thimble connector required to ensure the transmission of the pyrotechnic order, namely the two line ends of the pyrotechnic lines, and more particularly the protective envelopes. associates whose deformation encountered during the transmission of the pyrotechnic order directly generates the above-mentioned break.
  • the dimensioning and the choice of the material of the main structure, as well as the choice of the pyrotechnic lines, preferably chosen from standard lines, are carried out so that during the transmission of the pyrotechnic order, the envelope (s) protective structures deform adequately to cause the weakened section to break, and therefore to generate the dissociation of the two parts of the main structure.
  • the fact of having a rigid mechanical connection between the two parts of the structure, on which the pyrotechnic lines are respectively mounted makes it possible to perfectly master the play existing between the two ends of the line.
  • the main structure is a structure made in one piece, in a metallic material such as steel, aluminum or one of its alloys, or in a plastic material.
  • a metallic material such as steel, aluminum or one of its alloys, or in a plastic material.
  • the first and second parts as well as the weakened section of the main structure each have a cylindrical shape of circular section.
  • at least one of the first and second parts of the main structure is provided with attachment means.
  • these attachment means can then be of extremely simple design, in the sense that they are only intended to allow the attachment of the connector to an annex element, and not designed to ensure cooperation between the ends of line which is in turn simply obtained by mounting the pyrotechnic lines in their associated parts of the main structure.
  • the pyrotechnic connector may further include a splinter shield mounted on the main structure. In this way, the splinter shield is then secured to one of the first and second parts of the main structure, and arranged so as to surround the weakened section in order to oppose the projection of particles during the transmission of the pyrotechnic order.
  • the first and second line ends are preferably each provided with a protective envelope made of a metallic material.
  • first and second line ends are spaced from a clearance located at the weakened section of the main structure, so as to facilitate the breaking of this same section, always during the transmission of the pyrotechnic order.
  • the first and second pyrotechnic lines are assembled by screwing onto the main structure.
  • the weakened section of the main structure is provided with a fracture initiator, which can be in the form of a circumferential groove made externally on the weakened section.
  • the subject of the invention is a launcher comprising at least one pyrotechnic connection such as that described above and also subject of the present invention.
  • FIG. 1 shows a longitudinal sectional view of a pyrotechnic connector according to a preferred embodiment of the present invention, before the transmission of the pyrotechnic order
  • - Figure 2 shows a view similar to that of Figure 1, during the transmission of the pyrotechnic order
  • - Figure 2a shows a sectional view taken along line II-II of Figure 2
  • - Figure 3 shows a view similar to that of Figure 2, after the transmission of the pyrotechnic order
  • - Figure 4 shows a partial perspective view of a launcher according to a preferred embodiment of the present invention, this Figure 4 showing in particular a pyrotechnic connector fitted to the launcher, before the transmission of the pyrotechnic order
  • - Figure 5 shows a view similar to that of Figure 4, after the transmission of the pyrotechnic order.
  • a pyrotechnic connector 1 according to a preferred embodiment of the present invention.
  • the connector 1 is shown in a state in which the transmission of a pyrotechnic order from a first pyrotechnic line 2 to a second pyrotechnic line 4 has not yet been carried out.
  • the connector 1 has a main structure 6, preferably made in one piece, for example in an aluminum and copper alloy AU2GN - 2618A T851.
  • This main structure 6 essentially consists of a first part 8 and a second part 10 secured to each other by means of a weakened section 12, arranged between them.
  • the first and second parts 8 and 10 as well as the weakened section 12 of the main structure 6 each take the form of a cylinder of circular section arranged along the same longitudinal axis 14.
  • this axis 14 can therefore be assimilated to the longitudinal axis of the main structure 6, and more generally to the longitudinal axis of the pyrotechnic connection 1.
  • the weakened section coaxial with the two parts 8 and 10 has an outer diameter smaller than the two outer diameters of the parts 8 and 10.
  • This weakened section 12 constituting a rigid mechanical connection between the first part 8 and the second part 10 is provided with a rupture initiator 16.
  • the rupture initiator 16 can take the form of a simple circumferential groove formed on an external surface 18 of the weakened section 12, this outer surface 18 being cylindrical with a circular section.
  • this groove 16 can be located substantially in the middle of the weakened section 12, relative to a direction parallel to the longitudinal axis 14 of the connector 1.
  • the first part 8 is provided with attachment means 20 making it possible to fix the connector 1 on an annex element 22, the latter taking for example the form of a partition provided with a perforation 24 inside which is inserted the first part 8.
  • the attachment means 20 are in the form of a flange disposed around the first part 8, arranged to bear against the partition 22, and having holes 26 to secure it on the same partition 22, for example using a plurality of screws (not shown).
  • the attachment means 20 are made in one piece with the main structure 6 of the connector 1.
  • the second part 10 of the structure 6 could also have identical or similar attachment means in order to be able to be attached to another annex element (not shown), without departing from the scope of the invention.
  • the main structure 6 is on the other hand provided with a through passage 28, this passage 28 being formed along the longitudinal axis 14 through the two parts 8 and 10, as well as through the weakened section 12. Consequently, this weakened section 12 roughly takes the form of a thin crown, centered on the longitudinal axis 14.
  • the through passage 28 has a first threaded end 28a provided on the first part 8 in order to receive the first line pyrotechnic 2, and a second threaded end 28b provided on the second part 10 to receive the second pyrotechnic line. Still with reference to FIG.
  • the first pyrotechnic line 2 has a line end 30 similar to a pyrotechnic relay, this line end 30 being provided with a protective envelope 30a in the form of a tube, for example metallic .
  • the second pyrotechnic line 4 of the connector 1 has a line end 32 similar to a pyrotechnic relay, this line end 32 being provided with a protective envelope 32a in the form of a tube, preferably also metallic. It is indicated that these protective envelopes 30a and 32a are able to deform during the transmission of the pyrotechnic order, in order to cause a break in the weakened section 12 of the main structure 6.
  • the line ends 30 and 32 are located opposite from each other inside the through passage 28, and are spaced from a clearance 34 adapted on the one hand to ensure high reliability of transmission of the pyrotechnic order, and on the other hand to optimize the breakage of the weakened section 12.
  • the clearance 34 is at the level of the breaking point 16 of the weakened section 12.
  • the pyrotechnic connection 1 also includes a splinter shield 36 which is mounted fixedly around the second part 10, for example by welding. This splinter shield 36 can take the form of a sheath marrying the second part 10, and extending to the first part 8 in which it is simply fitted, over a short length.
  • the splinter shield 36 is completely free relative to the first part 8, without departing from the scope of the invention.
  • the shield 36 anyway surrounds the weakened section 12, and forms with it an annular space 38 fully closed, centered on the longitudinal axis 14.
  • the connection 1 is shown in a state in which the transmission of the pyrotechnic order from the first pyrotechnic line 2 to the second pyrotechnic line 4 has just occurred.
  • lines 2 and 4 being preferably identical, the phenomenon which will be described below would occur in the same way if the transmission of the pyrotechnic order was carried out from the second line 4 to the first line 2.
  • the protective envelopes 30a and 32a of the line ends 30 and 32 are deformed and make it possible to break the weakened section 12 when they come into contact with the latter which is effectively dislocated into a multitude of fragments 40 projected inside the annular space 38.
  • the fragments 40 of the weakened section 12 are stopped by the splinter shield 36 provided for this purpose.
  • the ends of the protective envelopes 30a and 32a then each take the form of a plurality of tongues 30b, 32b arranged in a circular fashion and each extending generally radially outwards, as it can be seen in Figure 2a.
  • the two parts 8 and 10 of the main structure 6 are dissociated from each other, the only indirect cooperation remaining between these two parts 8 and 10 being constituted by the slight interlocking of the shield 36 and of the first part 8. Obviously, this is the case only when a splinter shield 36 is provided on the connector 1.
  • a launcher 100 comprising in particular a cryogenic main stage 102 (called “EPC” in the following description), as well as one or more powder acceleration stages 104 (called “EAP” in the following description, and of which only one d ' between them is shown in Figure 4).
  • the EPC 102 and the EAP 104 are in particular connected by a connecting rod 106, which must naturally be cut to ensure the separation of the EPC 102 and the EAP 104, this separation being necessary for the release of the EAP 104.
  • a pyrotechnic connection 1 such as that described above and therefore only shown diagrammatically in FIG.
  • connection 1 being arranged so that the first pyrotechnic line 2 either connected to the EPC 102, and so that the second pyrotechnic line 4 is connected to the rod 106.
  • the second pyrotechnic line 4 preferably extends through the rod 106 until it can cooperate with a ring of cutting (not shown) of the connecting rod 106.
  • the cutting ring when it is actuated, is intended to cause a break in the connecting rod 106 according to a fictitious cutting plane 108, in order to allow the separation of the EPC 102 and the EAP 104.
  • the first part 8 of the connector 1 is fixedly mounted on the EPC 102 using the attachment means 20.
  • the EPC 102 when it is decided to release the EAP 104, the EPC 102 then sends a pyrotechnic order via the first line 2 of the pyrotechnic connector 1.
  • the first and second parts 8 and 10 dissociate as c ela has been explained above, by breaking the weakened section 12 (not shown in Figures 4 and 5).
  • the pyrotechnic order propagates along the second line 4, until it reaches the cutting ring which is then actuated. This causes the two parts 110 and 112 of the connecting rod 106 to break, according to the above-mentioned fictitious cutting plane 108. Consequently, as can be clearly seen in FIG.
  • the assembly comprising the second part 10 of fitting 1, the second pyrotechnic line 4, part 112 of the connecting rod 106 and the EAP 104 can be separated from the rest of the launcher 100, and therefore from the EPC 102, as shown schematically by the arrow 114.
  • various modifications can be made by those skilled in the art to the pyrotechnic connection 1 and to the launcher 100 which have just been described, only by way of nonlimiting examples.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Air Bags (AREA)
  • Measuring Fluid Pressure (AREA)
  • Casings For Electric Apparatus (AREA)

Abstract

The invention relates to a pyrotechnical connection (1) provided with separable parts whose main structure (6) comprises a first part (8) and a second part (10) provided with a first and second pyrotechnical lines (2, 4), the parts (8, 10) being connected to each other and are separable when a pyrotechnical instruction is transmitted, a weakened section (12) connected to the first and second parts and a passage (28) crossing the first and second ends (30, 32) of the lines (2, 4) adjacent downwards said passage (28). In addition, each first and second end of the lines is provided with a protective envelope (30a, 32a) which is deformable in such a way that the weakened section is broken when a pyrotechnical instruction is transmitted.

Description

RACCORD PYROTECHNIQUE A PARTIES DISSOCIABLES ET LANCEUR COMPORTANT AU MOINS UN TEL RACCORDPYROTECHNIC CONNECTION WITH SEPARABLE PARTS AND LAUNCHER COMPRISING AT LEAST ONE SUCH CONNECTION
DESCRIPTIONDESCRIPTION
DOMAINE TECHNIQUE La présente invention se rapporte de façon générale au domaine des raccords pyrotechniques, et plus particulièrement à celui des raccords pyrotechniques à deux parties dissociables comportant une première ligne pyrotechnique munie d'une première extrémité de ligne, ainsi qu'une seconde ligne pyrotechnique munie d'une seconde extrémité de ligne. Un tel raccord est susceptible d'être employé dans tout système pyrotechnique, et plus spécifiquement adapté pour être interposé entre deux entités quelconques destinées à être séparées l'une de l'autre à la suite de la transmission d'un ordre pyrotechnique entre les deux lignes. A titre indicatif, ce type de raccord peut être agencé entre deux étages différents d'un lanceur, ou encore entre un élément largable et un autre élément quelconque de ce même lanceur. A cet égard, l'invention se rapporte également à un lanceur comportant au moins un tel raccord pyrotechnique. Enfin, il est précisé que l'invention trouve également des applications dans le domaine des systèmes pyrotechniques équipant des aéronefs ou des hélicoptères. ETAT DE LA TECHNIQUE ANTERIEURE Dans l'art antérieur, il a dé à été proposé des raccords pyrotechniques à parties dissociables, par exemple tels que celui décrit dans le document FR-A-2 470 757. Dans ce document, les deux parties distinctes du raccord sont emboîtées l'une dans l'autre de façon à ce que les deux lignes pyrotechniques associées à ces deux parties soient en regard l'une de l'autre, dans le but évident d'assurer une transmission correcte d'un ordre pyrotechnique de l'une à l'autre de ces lignes. Par ailleurs, pour permettre le maintien entre les deux parties non-solidaires tant que la transmission de l'ordre n'a pas été effectuée, ces deux parties sont respectivement assemblées individuellement sur deux éléments annexes distincts destinés a être séparés . Ainsi, avec une telle configuration, c'est 1' éloignement de ces deux éléments auxquels sont raccordées fixement les parties du raccord qui provoquent le désemboîtement et la dissociation de ces dernières, cet éloignement étant bien entendu provoqué uniquement après la transmission de l'ordre pyrotechnique d'une ligne à l'autre. Par conséquent, si cette solution de l'art antérieur permet effectivement de présenter deux parties aptes à être dissociées suite à la transmission d'un ordre pyrotechnique, le maintien précis requis entre ces deux mêmes parties non-solidaires durant toute la période précédant la transmission de l'ordre nécessite de prévoir des moyens de fixation adaptés pour assurer l'assemblage entre les parties du raccord et leurs éléments annexes associés. Bien entendu, cette contrainte constitue inéluctablement un inconvénient majeur en termes de complexité de conception, et de coût global du raccord pyrotechnique.TECHNICAL FIELD The present invention relates generally to the field of pyrotechnic fittings, and more particularly to that of pyrotechnic fittings with two separable parts comprising a first pyrotechnic line provided with a first line end, as well as a second pyrotechnic line provided a second end of line. Such a connection is capable of being used in any pyrotechnic system, and more specifically adapted to be interposed between any two entities intended to be separated from each other following the transmission of a pyrotechnic order between the two lines. As an indication, this type of connection can be arranged between two different stages of a launcher, or between a releasable element and any other element of this same launcher. In this regard, the invention also relates to a launcher comprising at least one such pyrotechnic connection. Finally, it should be noted that the invention also finds applications in the field of pyrotechnic systems fitted to aircraft or helicopters. STATE OF THE PRIOR ART In the prior art, pyrotechnic connections have been proposed with separable parts, for example such as that described in document FR-A-2 470 757. In this document, the two distinct parts of the fitting are nested one inside the other so that the two pyrotechnic lines associated with these two parts are opposite one another, with the obvious aim of ensuring a correct transmission of a pyrotechnic order from one to the other of these lines. Furthermore, to allow maintenance between the two non-integral parts as long as the transmission of the order has not been carried out, these two parts are respectively assembled individually on two separate annexed elements intended to be separated. Thus, with such a configuration, it is the distance of these two elements to which the parts of the connector are fixedly connected which cause the disengaging and the dissociation of the latter, this distance being of course caused only after the transmission of the order. pyrotechnic from one line to another. Consequently, if this solution of the prior art effectively makes it possible to present two parts capable of being dissociated following the transmission of a pyrotechnic order, the precise maintenance required between these same two non-interdependent parts throughout the period preceding the transmission of the order requires to provide suitable fixing means to ensure assembly between the parts of the fitting and their associated ancillary elements. Of course, this constraint inevitably constitutes a major drawback in terms of design complexity, and overall cost of the pyrotechnic connection.
EXPOSÉ DE L'INVENTION L' invention a donc pour but de proposer un raccord pyrotechnique à parties dissociables comportant une première ligne pyrotechnique munie d' une première extrémité de ligne, ainsi qu'une seconde ligne pyrotechnique munie d'une seconde extrémité de ligne, le raccord remédiant au moins partiellement aux inconvénients mentionnés ci-dessus relatifs aux réalisations de l'art antérieur. En outre, l'invention a pour but de présenter un lanceur comportant au moins un tel raccord pyrotechnique . Pour ce faire, l'invention a tout d'abord pour objet un raccord pyrotechnique à parties dissociables comportant une première ligne pyrotechnique munie d'une première extrémité de ligne, ainsi qu'une seconde ligne pyrotechnique munie d'une seconde extrémité de ligne. Selon l'invention, ce raccord pyrotechnique présente une structure principale comportant : - une première partie et une seconde partie respectivement équipées des première et seconde lignes pyrotechniques, les première et seconde parties étant solidaires l'une de l'autre et aptes à être dissociées lors d'une transmission d'un ordre pyrotechnique de l'une à l'autre des première et seconde lignes pyrotechniques ; - une section affaiblie solidaire d'une part de la première partie et d'autre part de la seconde partie ; et - un passage traversant s' étendant à travers la section affaiblie ainsi qu' à travers les première et seconde parties, les première et seconde extrémités de ligne des lignes pyrotechniques étant agencées en regard à l'intérieur du passage traversant . De plus, selon l'invention, les première et seconde extrémités de ligne des lignes pyrotechniques sont chacune munies d'une enveloppe protectrice apte à se déformer lors de la transmission de l'ordre pyrotechnique, afin de provoquer une cassure de la section affaiblie de la structure principale. Avantageusement, le raccord selon l'invention est conçu de telle sorte que les deux parties de la structure principale sont solidaires l'une de l'autre avant la transmission de l'ordre pyrotechnique entraînant leur dissociation, et non- uniquement insérées l'une dans l'autre comme cela était le cas dans la réalisation de l'art antérieur présentée ci-dessus. Par conséquent, une liaison mécanique rigide étant prévue entre les deux parties de la structure principale, il n'est donc plus nécessaire de prévoir des moyens complexes de fixation de ces parties sur les éléments annexes pour pouvoir assurer la coopération souhaitée entre les deux extrémités de ligne. Naturellement, cette spécificité engendre une simplification de la conception globale du raccord, ainsi qu'une réduction significative de ses coûts de production. De plus, la rupture de la section affaiblie s'effectue avantageusement en utilisant des éléments constitutifs du raccord dé à requis pour assurer la transmission de l'ordre pyrotechnique, à savoir les deux extrémités de ligne des lignes pyrotechniques, et plus particulièrement les enveloppes protectrices associées dont la déformation rencontrée lors de la transmission de l'ordre pyrotechnique engendre directement la cassure susmentionnée. Bien entendu, le dimensionnement et le choix du matériau de la structure principale, ainsi que le choix des lignes pyrotechniques, de préférence choisies parmi des lignes standards, sont effectués de sorte que lors de la transmission de l'ordre pyrotechnique, la/les enveloppes protectrices se déforment de façon adéquate pour provoquer la cassure de la section affaiblie, et donc pour générer la dissociation des deux parties de la structure principale. Enfin, il est indiqué que le fait de disposer d'une liaison mécanique rigide entre les deux parties de la structure, sur lesquelles sont respectivement montées les lignes pyrotechniques, permet de maîtriser parfaitement le jeu existant entre les deux extrémités de ligne. Ainsi, il apparaît clairement que la présence de la liaison mécanique rigide, constituée globalement par la section affaiblie de la structure, contribue alors à assurer une fiabilité très élevée de la transmission de l'ordre pyrotechnique . De préférence, la structure principale est une structure réalisée d'un seul tenant, dans un matériau métallique tel que l'acier, l'aluminium ou l'un de ses alliages, ou encore dans un matériau plastique. Bien entendu, cette spécificité permet de simplifier encore davantage la conception du raccord, et de diminuer les coûts de production de celui-ci. En outre, il est possible de prévoir que les première et seconde parties ainsi que la section affaiblie de la structure principale présente chacune une forme cylindrique de section circulaire. De manière préférentielle, au moins l'une des première et seconde parties de la structure principale est pourvue de moyens d'attache. Dans un tel cas, ces moyens d'attache peuvent alors être de conception extrêmement simple, en ce sens qu'ils sont uniquement prévus pour permettre la fixation du raccord sur un élément annexe, et non pas conçus pour assurer la coopération entre les extrémités de ligne qui est quant à elle simplement obtenue par le montage des lignes pyrotechniques dans leurs parties associées de la structure principale. De plus, le raccord pyrotechnique peut comporter en outre un bouclier pare-éclats monté sur la structure principale. De cette façon, le bouclier pare- éclats est alors solidarisé à l'une des première et seconde parties de la structure principale, et agencé de manière à entourer la section affaiblie afin de s'opposer à la projection de particules lors de la transmission de l'ordre pyrotechnique. Par ailleurs, les première et seconde extrémités de ligne sont de préférence chacune munies d'une enveloppe protectrice réalisée dans un matériau métallique . En outre, les première et seconde extrémités de ligne sont espacées d'un jeu situé au niveau de la section affaiblie de la structure principale, de manière à faciliter la cassure de cette même section, toujours lors de la transmission de l'ordre pyrotechnique. De façon préférentielle, les première et seconde lignes pyrotechniques sont assemblées par vissage sur la structure principale. De manière préférée, la section affaiblie de la structure principale est pourvue d'une amorce de rupture, celle-ci pouvant se présenter sous la forme d'une rainure circonférentielle pratiquée extérieurement sur la section affaiblie. En outre, l'invention a pour objet un lanceur comportant au moins un raccord pyrotechnique tel que celui décrit ci-dessus et également objet de la présente invention. D'autres avantages et caractéristiques de l'invention apparaîtront dans la description détaillée non limitative ci-dessous.PRESENTATION OF THE INVENTION The object of the invention is therefore to propose a pyrotechnic connection with dissociable parts comprising a first pyrotechnic line provided with a first line end, as well as a second pyrotechnic line provided with a second line end, the connector at least partially remedying the drawbacks mentioned above relating to the embodiments of the prior art. In addition, the invention aims to present a launcher comprising at least one such pyrotechnic connection. To do this, the invention firstly relates to a pyrotechnic connection with separable parts comprising a first pyrotechnic line provided with a first line end, as well as a second pyrotechnic line provided with a second line end. According to the invention, this pyrotechnic connection has a main structure comprising: - a first part and a second part respectively equipped with the first and second pyrotechnic lines, the first and second parts being integral with one another and capable of being dissociated during a transmission of a pyrotechnic order of to each other of the first and second pyrotechnic lines; - a weakened section integral on the one hand with the first part and on the other hand with the second part; and - a through passage extending through the weakened section as well as through the first and second parts, the first and second line ends of the pyrotechnic lines being arranged opposite inside the through passage. In addition, according to the invention, the first and second line ends of the pyrotechnic lines are each provided with a protective envelope capable of being deformed during the transmission of the pyrotechnic order, in order to cause a break in the weakened section of the main structure. Advantageously, the connector according to the invention is designed such that the two parts of the main structure are integral with one another before the transmission of the pyrotechnic order causing their dissociation, and not only inserted one in the other as was the case in the realization of the prior art presented above. Consequently, a rigid mechanical connection being provided between the two parts of the main structure, it is no longer necessary to provide complex means for fixing these parts to the ancillary elements in order to be able to ensure the desired cooperation between the two ends of line. Naturally, this specificity leads to a simplification of the overall design of the fitting, as well as a significant reduction in its production costs. In addition, the rupture of the weakened section is advantageously effected by using elements constituting the thimble connector required to ensure the transmission of the pyrotechnic order, namely the two line ends of the pyrotechnic lines, and more particularly the protective envelopes. associates whose deformation encountered during the transmission of the pyrotechnic order directly generates the above-mentioned break. Of course, the dimensioning and the choice of the material of the main structure, as well as the choice of the pyrotechnic lines, preferably chosen from standard lines, are carried out so that during the transmission of the pyrotechnic order, the envelope (s) protective structures deform adequately to cause the weakened section to break, and therefore to generate the dissociation of the two parts of the main structure. Finally, it is indicated that the fact of having a rigid mechanical connection between the two parts of the structure, on which the pyrotechnic lines are respectively mounted, makes it possible to perfectly master the play existing between the two ends of the line. Thus, it clearly appears that the presence of the rigid mechanical connection, globally constituted by the weakened section of the structure, then contributes to ensuring a very high reliability of the transmission of the pyrotechnic order. Preferably, the main structure is a structure made in one piece, in a metallic material such as steel, aluminum or one of its alloys, or in a plastic material. Of course, this specificity makes it possible to further simplify the design of the connector, and to reduce the production costs thereof. In addition, it is possible to provide that the first and second parts as well as the weakened section of the main structure each have a cylindrical shape of circular section. Preferably, at least one of the first and second parts of the main structure is provided with attachment means. In such a case, these attachment means can then be of extremely simple design, in the sense that they are only intended to allow the attachment of the connector to an annex element, and not designed to ensure cooperation between the ends of line which is in turn simply obtained by mounting the pyrotechnic lines in their associated parts of the main structure. In addition, the pyrotechnic connector may further include a splinter shield mounted on the main structure. In this way, the splinter shield is then secured to one of the first and second parts of the main structure, and arranged so as to surround the weakened section in order to oppose the projection of particles during the transmission of the pyrotechnic order. Furthermore, the first and second line ends are preferably each provided with a protective envelope made of a metallic material. In addition, the first and second line ends are spaced from a clearance located at the weakened section of the main structure, so as to facilitate the breaking of this same section, always during the transmission of the pyrotechnic order. Preferably, the first and second pyrotechnic lines are assembled by screwing onto the main structure. Preferably, the weakened section of the main structure is provided with a fracture initiator, which can be in the form of a circumferential groove made externally on the weakened section. In addition, the subject of the invention is a launcher comprising at least one pyrotechnic connection such as that described above and also subject of the present invention. Other advantages and characteristics of the invention will appear in the detailed non-limiting description below.
BREVE DESCRIPTION DES DESSINS Cette description sera faite au regard des dessins annexés parmi lesquels ; - la figure 1 représente une vue en coupe longitudinale d'un raccord pyrotechnique selon un mode de réalisation préféré de la présente invention, avant la transmission de l'ordre pyrotechnique ; - la figure 2 représente une vue similaire à celle de la figure 1, lors de la transmission de l'ordre pyrotechnique ; - la figure 2a représente une vue en coupe prise le long de la ligne II-II de la figure 2 ; - la figure 3 représente une vue similaire à celle de la figure 2, après la transmission de l'ordre pyrotechnique ; - la figure 4 représente une vue partielle en perspective d'un lanceur selon un mode de réalisation préféré de la présente invention, cette figure 4 montrant notamment un raccord pyrotechnique équipant le lanceur, avant la transmission de l'ordre pyrotechnique ; et - la figure 5 représente une vue similaire à celle de la figure 4, après la transmission de l'ordre pyrotechnique.BRIEF DESCRIPTION OF THE DRAWINGS This description will be made with reference to the accompanying drawings, among which; - Figure 1 shows a longitudinal sectional view of a pyrotechnic connector according to a preferred embodiment of the present invention, before the transmission of the pyrotechnic order; - Figure 2 shows a view similar to that of Figure 1, during the transmission of the pyrotechnic order; - Figure 2a shows a sectional view taken along line II-II of Figure 2; - Figure 3 shows a view similar to that of Figure 2, after the transmission of the pyrotechnic order; - Figure 4 shows a partial perspective view of a launcher according to a preferred embodiment of the present invention, this Figure 4 showing in particular a pyrotechnic connector fitted to the launcher, before the transmission of the pyrotechnic order; and - Figure 5 shows a view similar to that of Figure 4, after the transmission of the pyrotechnic order.
EXPOSÉ DÉTAILLÉ DE MODES DE RÉALISATION PRÉFÉRÉSDETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
En référence à la figure 1, on voit un raccord pyrotechnique 1 selon un mode de réalisation préféré de la présente invention. Sur cette figure 1, le raccord 1 est représenté dans un état dans lequel la transmission d'un ordre pyrotechnique d'une première ligne pyrotechnique 2 à une seconde ligne pyrotechnique 4 n'a pas encore été réalisée. Le raccord 1 comporte une structure principale 6, de préférence réalisée d'un seul tenant, par exemple dans un alliage d' aluminium et de cuivre AU2GN - 2618A T851. Cette structure principale 6 est essentiellement constituée d'une première partie 8 et d'une seconde partie 10 solidarisées l'une à l'autre par l'intermédiaire d'une section affaiblie 12, agencée entre celles-ci. A ce titre et de manière préférée, les première et seconde parties 8 et 10 ainsi que la section affaiblie 12 de la structure principale 6 prennent chacune la forme d'un cylindre de section circulaire agencé selon un même axe longitudinal 14. Ainsi, cet axe 14 peut par conséquent être assimilé à l'axe longitudinal de la structure principale 6, et plus généralement à l'axe longitudinal du raccord pyrotechnique 1. Comme sa terminologie l'indique, la section affaiblie coaxiale aux deux parties 8 et 10 dispose d'un diamètre extérieur plus petit que les deux diamètres extérieurs des parties 8 et 10. Cette section affaiblie 12 constituant une liaison mécanique rigide entre la première partie 8 et la seconde partie 10 est pourvue d'une amorce de rupture 16. En effet, comme cela sera expliqué de façon plus détaillée ultérieurement, c'est cette même section affaiblie 12 qui est destinée à être cassée lors de la transmission de l'ordre pyrotechnique de l'une à l'autre des lignes pyrotechniques 2 et 4, afin d'engendrer la dissociation des deux parties 8 et 10. A titre d'exemple îllustratif, pour favoriser la cassure de la section affaiblie 12, et donc celle de la liaison mécanique rigide entre les deux parties 8 et 10, l'amorce de rupture 16 peut prendre la forme d'une simple rainure circonférentielle pratiquée sur une surface extérieure 18 de la section affaiblie 12, cette surface extérieure 18 étant cylindrique de section circulaire. De plus, cette rainure 16 peut être située sensiblement au milieu de la section affaiblie 12, par rapport à une direction parallèle à l'axe longitudinal 14 du raccord 1. D'autre part, dans le mode de réalisation préféré représenté sur la figure 1, la première partie 8 est pourvue de moyens d'attache 20 permettant de fixer le raccord 1 sur un élément annexe 22, celui-ci prenant par exemple la forme d'une cloison munie d'une perforation 24 à l'intérieur de laquelle est insérée la première partie 8. Toujours à titre d'exemple îllustratif, les moyens d'attache 20 se présentent sous la forme d'une collerette disposée autour de la première partie 8, agencée en appui contre la cloison 22, et disposant de trous 26 pour assurer sa fixation sur cette même cloison 22, par exemple à l'aide d'une pluralité de vis (non représentées) . De manière préférentielle, les moyens d'attache 20 sont réalisés d'une seul tenant avec la structure principale 6 du raccord 1. Bien entendu, la seconde partie 10 de la structure 6 pourrait également présenter des moyens d'attache identiques ou similaires pour pouvoir être fixée à un autre élément annexe (non représenté) , sans sortir du cadre de l'invention. La structure principale 6 est d' autre part munie d'un passage traversant 28, ce passage 28 étant pratiqué selon l'axe longitudinal 14 à travers les deux parties 8 et 10, ainsi qu'à travers la section affaiblie 12. Par conséquent, cette section affaiblie 12 prend grossièrement la forme d'une couronne de faible épaisseur, centrée sur l'axe longitudinal 14. A ce titre, le passage traversant 28 comporte une première extrémité filetée 28a prévue sur la première partie 8 afin de recevoir la première ligne pyrotechnique 2, ainsi qu'une seconde extrémité filetée 28b prévue sur la seconde partie 10 afin de recevoir la seconde ligne pyrotechnique . Toujours en référence à la figure 1, on peut voir que la première ligne pyrotechnique 2 comporte une extrémité de ligne 30 assimilable à un relais pyrotechnique, cette extrémité de ligne 30 étant pourvue d'une enveloppe protectrice 30a en forme de tube, par exemple métallique. De la même façon, la seconde ligne pyrotechnique 4 du raccord 1 comporte une extrémité de ligne 32 assimilable à un relais pyrotechnique, cette extrémité de ligne 32 étant pourvue d'une enveloppe protectrice 32a en forme de tube, de préférence également métallique. Il est indiqué que ces enveloppes protectrices 30a et 32a sont aptes à se déformer lors de la transmission de l'ordre pyrotechnique, afin de provoquer une cassure de la section affaiblie 12 de la structure principale 6. Lorsque les lignes pyrotechniques 2 et 4 sont installées sur la structure principale 6, les extrémités de ligne 30 et 32 se trouvent en regard l'une de l'autre à l'intérieur du passage traversant 28, et sont espacées d'un jeu 34 adapté d'une part pour assurer une fiabilité élevée de transmission de l'ordre pyrotechnique, et d'autre part pour optimiser la cassure de la section affaiblie 12. Typiquement, le jeu 34 se trouve au niveau de l'amorce de rupture 16 de la section affaiblie 12. Le raccord pyrotechnique 1 selon le mode de réalisation préféré comporte également un bouclier pare-éclats 36 qui est monté fixement autour de la seconde partie 10, par exemple par soudage. Ce bouclier pare-éclats 36 peut prendre la forme d'un fourreau épousant la seconde partie 10, et s' étendant jusqu'à la première partie 8 dans laquelle il est simplement emboîté, sur une faible longueur. Il pourrait également être possible de prévoir que le bouclier pare-éclats 36 soit totalement libre par rapport à la première partie 8, sans sortir du cadre de l'invention. Quelle que soit la configuration adoptée, le bouclier 36 entoure de toute façon la section affaiblie 12, et forme avec celle-ci un espace annulaire 38 intégralement fermé, centré sur l'axe longitudinal 14. En référence à présent à la figure 2, le raccord 1 est représenté dans un état dans lequel la transmission de l'ordre pyrotechnique de la première ligne pyrotechnique 2 à la seconde ligne pyrotechnique 4 vient de se produire. Naturellement, les lignes 2 et 4 étant de préférence identiques, le phénomène qui va être décrit ci-dessous se produirait de la même façon si la transmission de l'ordre pyrotechnique s'effectuait de la seconde ligne 4 à la première ligne 2. Comme on peut l'apercevoir sur cette figure 2, lors de la transmission de l'ordre pyrotechnique, les enveloppes protectrices 30a et 32a des extrémités de ligne 30 et 32 se déforment et permettent de casser la section affaiblie 12 lorsqu'elles entrent en contact avec cette dernière qui est effectivement disloquée en une multitude de fragments 40 projetés à l'intérieur de l'espace annulaire 38. Comme cela est représenté schematiquement sur la figure 2, les fragments 40 de la section affaiblie 12 sont stoppés par le bouclier pare- éclats 36 prévu à cet effet. Il est précisé qu'une fois la transmission terminée, les extrémités des enveloppes protectrices 30a et 32a prennent alors chacune la forme d'une pluralité de languettes 30b, 32b disposées de façon circulaire et s' étendant chacune globalement radialement vers l'extérieur, comme on peut l'apercevoir sur la figure 2a. A cet instant, les deux parties 8 et 10 de la structure principale 6 sont dissociées l'une de l'autre, la seule coopération indirecte restante entre ces deux parties 8 et 10 étant constituée par le faible emboîtement du bouclier 36 et de la première partie 8. Bien évidemment, tel est le cas uniquement lorsqu'un bouclier pare-éclats 36 est prévu sur le raccord 1. Ainsi, lorsque l'élément annexe (non représenté) sur lequel est raccordée la seconde ligne pyrotechnique 4 s'écarte de la paroi 22 comme représenté schematiquement par la flèche 42 de la figure 3, et donc lorsqu'il s'éloigne de l'autre élément annexe (pas non plus représenté) sur lequel la première ligne pyrotechnique 2 est raccordée, la coopération entre le bouclier pare-éclats 36 et la première partie 8 est facilement rompue, de sorte que l'on peut alors apercevoir un éloignement des deux parties 8 et 10 de la structure principale 6 du raccord 1. Naturellement, il est noté que suite à la séparation entre les deux parties 8 et 10, la première partie 8 reste toujours fixée à la cloison 22 par l'intermédiaire des moyens d'attache 20. En référence a la figure 4, on peut voir très schematiquement une partie d'un lanceur 100 selon un mode de réalisation préféré de la présente invention, ce lanceur 100 comportant notamment un étage principal cryotechnique 102 (dénommé « EPC » dans la suite de la description), ainsi qu'un ou plusieurs étages d'accélération à poudre 104 (dénommé « EAP » dans la suite de la description, et dont un seul d'entre-eux est représenté sur la figure 4). Dans ce mode de réalisation préféré, l'EPC 102 et l'EAP 104 sont notamment reliés par une bielle 106, qui doit naturellement être découpée pour assurer la désolidarisation de l'EPC 102 et de l'EAP 104, cette désolidarisation étant nécessaire au largage de l'EAP 104. Pour ce faire, il est prévu un raccord pyrotechnique 1 tel que celui décrit ci-dessus et donc uniquement représenté schematiquement sur la figure 4, ce raccord 1 étant agencé de manière à ce que la première ligne pyrotechnique 2 soit raccordée à l'EPC 102, et de sorte que la seconde ligne pyrotechnique 4 soit raccordée à la bielle 106. A ce titre, il est précisé que la seconde ligne pyrotechnique 4 s'étend de préférence à travers la bielle 106 jusqu'à pouvoir coopérer avec un anneau de découpe (non représenté) de la bielle 106. De façon connue, l'anneau de découpe, lorsqu'il est actionné, est prévu pour provoquer une cassure de la bielle 106 selon un plan de découpe fictif 108, afin de permettre la désolidarisation de l'EPC 102 et de l'EAP 104. Par ailleurs, on peut voir sur cette figure 4 que la première partie 8 du raccord 1 est montée fixement sur l'EPC 102 à l'aide des moyens d'attache 20. Avec un tel agencement, lorsqu'il est décidé de larguer l'EAP 104, l'EPC 102 envoie alors un ordre pyrotechnique par l'intermédiaire de la première ligne 2 du raccord pyrotechnique 1. De cette façon, lorsque l'ordre transite par la structure principale 6, les première et seconde parties 8 et 10 se dissocient comme cela a été expliqué ci-dessus, par rupture de la section affaiblie 12 (non représentée sur les figures 4 et 5) . Dans un même temps, l'ordre pyrotechnique se propage tout le long de la seconde ligne 4, jusqu'à ce qu'il atteigne l'anneau de découpe qui est alors actionné. Cela provoque la cassure en deux parties 110 et 112 de la bielle 106, selon le plan de découpe fictif 108 susmentionné. Par conséquent, comme on peut clairement l'apercevoir sur la figure 5, l'ensemble comportant la seconde partie 10 du raccord 1, la seconde ligne pyrotechnique 4, la partie 112 de la bielle 106 ainsi que l'EAP 104 peut être écarté du reste du lanceur 100, et donc de l'EPC 102, comme cela est représenté schematiquement par la flèche 114. Bien entendu, diverses modifications peuvent être apportées par l'homme du métier au raccord pyrotechnique 1 et au lanceur 100 qui viennent d'être décrits, uniquement à titre d'exemples non limitatifs. Referring to Figure 1, there is shown a pyrotechnic connector 1 according to a preferred embodiment of the present invention. In this FIG. 1, the connector 1 is shown in a state in which the transmission of a pyrotechnic order from a first pyrotechnic line 2 to a second pyrotechnic line 4 has not yet been carried out. The connector 1 has a main structure 6, preferably made in one piece, for example in an aluminum and copper alloy AU2GN - 2618A T851. This main structure 6 essentially consists of a first part 8 and a second part 10 secured to each other by means of a weakened section 12, arranged between them. As such and preferably, the first and second parts 8 and 10 as well as the weakened section 12 of the main structure 6 each take the form of a cylinder of circular section arranged along the same longitudinal axis 14. Thus, this axis 14 can therefore be assimilated to the longitudinal axis of the main structure 6, and more generally to the longitudinal axis of the pyrotechnic connection 1. As its terminology indicates, the weakened section coaxial with the two parts 8 and 10 has an outer diameter smaller than the two outer diameters of the parts 8 and 10. This weakened section 12 constituting a rigid mechanical connection between the first part 8 and the second part 10 is provided with a rupture initiator 16. Indeed, like this will be explained in more detail later, it is this same weakened section 12 which is intended to be broken during the transmission of the pyrotechnic order from one to the other re pyrotechnic lines 2 and 4, in order to generate the dissociation of the two parts 8 and 10. As an illustrative example, to promote breakage of the weakened section 12, and therefore that of the rigid mechanical connection between the two parts 8 and 10, the rupture initiator 16 can take the form of a simple circumferential groove formed on an external surface 18 of the weakened section 12, this outer surface 18 being cylindrical with a circular section. In addition, this groove 16 can be located substantially in the middle of the weakened section 12, relative to a direction parallel to the longitudinal axis 14 of the connector 1. On the other hand, in the preferred embodiment shown in Figure 1 , the first part 8 is provided with attachment means 20 making it possible to fix the connector 1 on an annex element 22, the latter taking for example the form of a partition provided with a perforation 24 inside which is inserted the first part 8. Still by way of illustrative example, the attachment means 20 are in the form of a flange disposed around the first part 8, arranged to bear against the partition 22, and having holes 26 to secure it on the same partition 22, for example using a plurality of screws (not shown). Preferably, the attachment means 20 are made in one piece with the main structure 6 of the connector 1. Of course, the second part 10 of the structure 6 could also have identical or similar attachment means in order to be able to be attached to another annex element (not shown), without departing from the scope of the invention. The main structure 6 is on the other hand provided with a through passage 28, this passage 28 being formed along the longitudinal axis 14 through the two parts 8 and 10, as well as through the weakened section 12. Consequently, this weakened section 12 roughly takes the form of a thin crown, centered on the longitudinal axis 14. As such, the through passage 28 has a first threaded end 28a provided on the first part 8 in order to receive the first line pyrotechnic 2, and a second threaded end 28b provided on the second part 10 to receive the second pyrotechnic line. Still with reference to FIG. 1, it can be seen that the first pyrotechnic line 2 has a line end 30 similar to a pyrotechnic relay, this line end 30 being provided with a protective envelope 30a in the form of a tube, for example metallic . Similarly, the second pyrotechnic line 4 of the connector 1 has a line end 32 similar to a pyrotechnic relay, this line end 32 being provided with a protective envelope 32a in the form of a tube, preferably also metallic. It is indicated that these protective envelopes 30a and 32a are able to deform during the transmission of the pyrotechnic order, in order to cause a break in the weakened section 12 of the main structure 6. When the pyrotechnic lines 2 and 4 are installed on the main structure 6, the line ends 30 and 32 are located opposite from each other inside the through passage 28, and are spaced from a clearance 34 adapted on the one hand to ensure high reliability of transmission of the pyrotechnic order, and on the other hand to optimize the breakage of the weakened section 12. Typically, the clearance 34 is at the level of the breaking point 16 of the weakened section 12. The pyrotechnic connection 1 according to the preferred embodiment also includes a splinter shield 36 which is mounted fixedly around the second part 10, for example by welding. This splinter shield 36 can take the form of a sheath marrying the second part 10, and extending to the first part 8 in which it is simply fitted, over a short length. It could also be possible to provide that the splinter shield 36 is completely free relative to the first part 8, without departing from the scope of the invention. Whatever the configuration adopted, the shield 36 anyway surrounds the weakened section 12, and forms with it an annular space 38 fully closed, centered on the longitudinal axis 14. With reference now to FIG. 2, the connection 1 is shown in a state in which the transmission of the pyrotechnic order from the first pyrotechnic line 2 to the second pyrotechnic line 4 has just occurred. Naturally, lines 2 and 4 being preferably identical, the phenomenon which will be described below would occur in the same way if the transmission of the pyrotechnic order was carried out from the second line 4 to the first line 2. As can be seen in this figure 2, during the transmission of the pyrotechnic order, the protective envelopes 30a and 32a of the line ends 30 and 32 are deformed and make it possible to break the weakened section 12 when they come into contact with the latter which is effectively dislocated into a multitude of fragments 40 projected inside the annular space 38. As shown diagrammatically in FIG. 2, the fragments 40 of the weakened section 12 are stopped by the splinter shield 36 provided for this purpose. It is specified that once the transmission is complete, the ends of the protective envelopes 30a and 32a then each take the form of a plurality of tongues 30b, 32b arranged in a circular fashion and each extending generally radially outwards, as it can be seen in Figure 2a. At this instant, the two parts 8 and 10 of the main structure 6 are dissociated from each other, the only indirect cooperation remaining between these two parts 8 and 10 being constituted by the slight interlocking of the shield 36 and of the first part 8. Obviously, this is the case only when a splinter shield 36 is provided on the connector 1. Thus, when the annex element (not shown) to which the second pyrotechnic line 4 is connected departs from the wall 22 as shown diagrammatically by the arrow 42 of the Figure 3, and therefore when it moves away from the other additional element (not shown either) on which the first pyrotechnic line 2 is connected, the cooperation between the splinter shield 36 and the first part 8 is easily broken , so that we can then see a distance between the two parts 8 and 10 of the main structure 6 of the connector 1. Naturally, it is noted that following the separation between the two parts 8 and 10, the first part 8 remains still attached to the partition 22 by means of attachment means 20. With reference to FIG. 4, one can very schematically see part of a launcher 100 according to a preferred embodiment of the present invention, this launcher 100 comprising in particular a cryogenic main stage 102 (called “EPC” in the following description), as well as one or more powder acceleration stages 104 (called “EAP” in the following description, and of which only one d ' between them is shown in Figure 4). In this preferred embodiment, the EPC 102 and the EAP 104 are in particular connected by a connecting rod 106, which must naturally be cut to ensure the separation of the EPC 102 and the EAP 104, this separation being necessary for the release of the EAP 104. To do this, there is provided a pyrotechnic connection 1 such as that described above and therefore only shown diagrammatically in FIG. 4, this connection 1 being arranged so that the first pyrotechnic line 2 either connected to the EPC 102, and so that the second pyrotechnic line 4 is connected to the rod 106. As such, it is specified that the second pyrotechnic line 4 preferably extends through the rod 106 until it can cooperate with a ring of cutting (not shown) of the connecting rod 106. In a known manner, the cutting ring, when it is actuated, is intended to cause a break in the connecting rod 106 according to a fictitious cutting plane 108, in order to allow the separation of the EPC 102 and the EAP 104. Furthermore, it can be seen in this figure 4 that the first part 8 of the connector 1 is fixedly mounted on the EPC 102 using the attachment means 20. With a such an arrangement, when it is decided to release the EAP 104, the EPC 102 then sends a pyrotechnic order via the first line 2 of the pyrotechnic connector 1. In this way, when the order passes through the structure main 6, the first and second parts 8 and 10 dissociate as c ela has been explained above, by breaking the weakened section 12 (not shown in Figures 4 and 5). At the same time, the pyrotechnic order propagates along the second line 4, until it reaches the cutting ring which is then actuated. This causes the two parts 110 and 112 of the connecting rod 106 to break, according to the above-mentioned fictitious cutting plane 108. Consequently, as can be clearly seen in FIG. 5, the assembly comprising the second part 10 of fitting 1, the second pyrotechnic line 4, part 112 of the connecting rod 106 and the EAP 104 can be separated from the rest of the launcher 100, and therefore from the EPC 102, as shown schematically by the arrow 114. Of course, various modifications can be made by those skilled in the art to the pyrotechnic connection 1 and to the launcher 100 which have just been described, only by way of nonlimiting examples.

Claims

REVENDICATIONS 1. Raccord pyrotechnique (1) à parties dissociables comportant une première ligne pyrotechnique (2) munie d'une première extrémité de ligne (30), ainsi qu'une seconde ligne pyrotechnique (4) munie d'une seconde extrémité de ligne (32), caractérisé en ce qu'il présente une structure principale (6) comportant : - une première partie (8) et une seconde partie (10) respectivement équipées des première et seconde lignes pyrotechniques (2,4), les première et seconde parties (8,10) étant solidaires l'une de l'autre et aptes à être dissociées lors d'une transmission d'un ordre pyrotechnique de l'une a l'autre des première et seconde lignes pyrotechniques (2,4) ; une section affaiblie (12) solidaire d'une part de la première partie (8) et d'autre part de la seconde partie (10) ; et - un passage traversant (28) s' étendant à travers la section affaiblie (12) ainsi qu'à travers les première et seconde parties (8,10), lesdites première et seconde extrémités de ligne (30,32) des lignes pyrotechniques (2,4) étant agencées en regard à l'intérieur dudit passage traversant (28) ; et en ce que lesdites première et seconde extrémités de ligne (30,32) des lignes pyrotechniques (2,4) sont chacune munies d'une enveloppe protectrice (30a, 32a) apte à se déformer lors de la transmission de l'ordre pyrotechnique, afin de provoquer une cassure de la section affaiblie (12) de ladite structure principale (6) . CLAIMS 1. Pyrotechnic connector (1) with separable parts comprising a first pyrotechnic line (2) provided with a first line end (30), as well as a second pyrotechnic line (4) provided with a second line end ( 32), characterized in that it has a main structure (6) comprising: - a first part (8) and a second part (10) respectively equipped with the first and second pyrotechnic lines (2,4), the first and second parts (8,10) being integral with one another and capable of being dissociated during a transmission of a pyrotechnic order from one to the other of the first and second pyrotechnic lines (2,4); a weakened section (12) integral on the one hand with the first part (8) and on the other hand with the second part (10); and - a through passage (28) extending through the weakened section (12) as well as through the first and second parts (8,10), said first and second line ends (30,32) of the pyrotechnic lines (2,4) being arranged facing each other inside said through passage (28); and in that said first and second line ends (30,32) of the pyrotechnic lines (2,4) are each provided with a protective envelope (30a, 32a) capable of being deformed during the transmission of the pyrotechnic order , in order to cause a break in the weakened section (12) of said main structure (6).
2. Raccord pyrotechnique (1) selon la revendication 1, caractérisé en ce que ladite structure principale (6) est une structure réalisée d'une seul tenant . 2. Pyrotechnic connection (1) according to claim 1, characterized in that said main structure (6) is a structure made in one piece.
3. Raccord pyrotechnique (1) selon la revendication 1 ou la revendication 2, caractérisé en ce que ladite structure principale (6) est réalisée dans un matériau métallique. 3. Pyrotechnic connection (1) according to claim 1 or claim 2, characterized in that said main structure (6) is made of a metallic material.
4. Raccord pyrotechnique (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que les première et seconde parties (8,10) ainsi que la section affaiblie (12) de ladite structure principale (6) présente chacune une forme cylindrique de section circulaire. 4. Pyrotechnic connection (1) according to any one of the preceding claims, characterized in that the first and second parts (8,10) as well as the weakened section (12) of said main structure (6) each has a cylindrical shape of circular section.
5. Raccord pyrotechnique (1) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins l'une des première et seconde parties (8,10) de ladite structure principale (6) est pourvue de moyens d'attache (20). 5. Pyrotechnic connection (1) according to any one of the preceding claims, characterized in that at least one of the first and second parts (8,10) of said main structure (6) is provided with attachment means (20).
6. Raccord pyrotechnique (1) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte en outre un bouclier pare-éclats (36) monté sur ladite structure principale (6) . 6. Pyrotechnic connection (1) according to any one of the preceding claims, characterized in that it further comprises a splinter shield (36) mounted on said main structure (6).
7. Raccord pyrotechnique (1) selon la revendication 6, caractérisé en ce que le bouclier pare-éclats (36) est solidarisé à l'une desdites première et seconde parties (8,10) de ladite structure principale (6), et agencé de façon à entourer ladite section affaiblie (12) . 7. Pyrotechnic connection (1) according to claim 6, characterized in that the splinter shield (36) is secured to one of said first and second parts (8,10) of said main structure (6), and arranged so as to surround said weakened section (12).
8. Raccord pyrotechnique (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que les enveloppes protectrices (30a, 32a) des première et seconde extrémités de ligne (30,32) sont métalliques. 8. Pyrotechnic connection (1) according to any one of the preceding claims, characterized in that the protective envelopes (30a, 32a) of the first and second line ends (30,32) are metallic.
9. Raccord pyrotechnique (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que les première et seconde extrémités de ligne (30,32) sont espacées d'un jeu (34) situé au niveau de la section affaiblie (12) de ladite structure principale (6) . 9. Pyrotechnic connector (1) according to any one of the preceding claims, characterized in that the first and second line ends (30,32) are spaced from a clearance (34) located at the weakened section (12 ) of said main structure (6).
10. Raccord pyrotechnique (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que les première et seconde lignes pyrotechniques (2,4) sont assemblées par vissage sur ladite structure principale (6) . 10. Pyrotechnic connection (1) according to any one of the preceding claims, characterized in that the first and second pyrotechnic lines (2,4) are assembled by screwing on said main structure (6).
11. Raccord pyrotechnique (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que la section affaiblie (12) de ladite structure principale (6) est pourvue d'une amorce de rupture (16) . 11. Pyrotechnic connector (1) according to any one of the preceding claims, characterized in that the weakened section (12) of said main structure (6) is provided with a rupture initiator (16).
12. Raccord pyrotechnique (1) selon la revendication 11, caractérisé en ce que l'amorce de rupture (16) se présente sous la forme d'une rainure circonférentielle pratiquée extérieurement sur la section affaiblie (12) . 12. Pyrotechnic connection (1) according to claim 11, characterized in that the rupture initiator (16) is in the form of a circumferential groove made externally on the weakened section (12).
13. Lanceur (100) caractérisé en ce qu'il comporte au moins un raccord pyrotechnique (1) selon l'une quelconque des revendications précédentes. 13. Launcher (100) characterized in that it comprises at least one pyrotechnic connection (1) according to any one of the preceding claims.
EP04805787.1A 2003-11-06 2004-10-28 Pyrotechnical connection provided with separable parts and a launcher comprising at least one such connection Ceased EP1695024B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0350799A FR2862131B1 (en) 2003-11-06 2003-11-06 PYROTECHNIC CONNECTION WITH DISSOCIABLE PARTS AND LAUNCHER COMPRISING AT LEAST ONE SUCH CONNECTION
PCT/FR2004/050544 WO2005047809A1 (en) 2003-11-06 2004-10-28 Pyrotechnical connection provided with separable parts and a launcher comprising at least one such connection

Publications (2)

Publication Number Publication Date
EP1695024A1 true EP1695024A1 (en) 2006-08-30
EP1695024B1 EP1695024B1 (en) 2016-12-14

Family

ID=34508735

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04805787.1A Ceased EP1695024B1 (en) 2003-11-06 2004-10-28 Pyrotechnical connection provided with separable parts and a launcher comprising at least one such connection

Country Status (4)

Country Link
EP (1) EP1695024B1 (en)
FR (1) FR2862131B1 (en)
NO (1) NO340169B1 (en)
WO (1) WO2005047809A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007039011A1 (en) * 2007-08-17 2009-02-19 Rheinmetall Waffe Munition Gmbh Device with two components, which are detachably connected to each other via a separating screw

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3623394A (en) * 1970-01-28 1971-11-30 Us Navy Frangible link
US3855934A (en) * 1972-09-28 1974-12-24 Us Army Blind mating connector for missile sections
FR2470757A1 (en) 1979-12-07 1981-06-12 Aerospatiale PYROTECHNIC CONNECTION WITH SEALED AND SELF-RELEASABLE PARTS
DE8716561U1 (en) * 1987-12-16 1989-04-13 Diehl GmbH & Co, 8500 Nürnberg Separating screw with head-side, electrically ignitable separating charge
US5402728A (en) * 1992-08-13 1995-04-04 Trw Inc. Low shock separation bolt

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005047809A1 *

Also Published As

Publication number Publication date
FR2862131A1 (en) 2005-05-13
NO20062542L (en) 2006-06-02
NO340169B1 (en) 2017-03-20
EP1695024B1 (en) 2016-12-14
WO2005047809A1 (en) 2005-05-26
FR2862131B1 (en) 2006-06-30

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