EP2271884A2 - Shutter system for closing off the gas exhaust pipe of a missile launcher - Google Patents

Shutter system for closing off the gas exhaust pipe of a missile launcher

Info

Publication number
EP2271884A2
EP2271884A2 EP09745983A EP09745983A EP2271884A2 EP 2271884 A2 EP2271884 A2 EP 2271884A2 EP 09745983 A EP09745983 A EP 09745983A EP 09745983 A EP09745983 A EP 09745983A EP 2271884 A2 EP2271884 A2 EP 2271884A2
Authority
EP
European Patent Office
Prior art keywords
panel
chimney
retaining means
missile
overpressure
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.)
Withdrawn
Application number
EP09745983A
Other languages
German (de)
French (fr)
Inventor
Alain Falip
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.)
Naval Group SA
Original Assignee
DCNS SA
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 DCNS SA filed Critical DCNS SA
Publication of EP2271884A2 publication Critical patent/EP2271884A2/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41F—APPARATUS FOR LAUNCHING PROJECTILES OR MISSILES FROM BARRELS, e.g. CANNONS; LAUNCHERS FOR ROCKETS OR TORPEDOES; HARPOON GUNS
    • F41F3/00—Rocket or torpedo launchers
    • F41F3/04—Rocket or torpedo launchers for rockets
    • F41F3/077—Doors or covers for launching tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B19/00—Arrangements or adaptations of ports, doors, windows, port-holes, or other openings or covers
    • B63B19/12—Hatches; Hatchways
    • B63B19/14—Hatch covers
    • B63B19/19—Hatch covers foldable
    • B63B19/197—Hatch covers foldable actuated by fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63G—OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS; MINE-LAYING; MINE-SWEEPING; SUBMARINES; AIRCRAFT CARRIERS
    • B63G3/00—Arrangements of ammunition stores or handlers; Vessels characterised thereby
    • B63G3/04—Arrangements of ammunition stores or handlers; Vessels characterised thereby for missiles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41F—APPARATUS FOR LAUNCHING PROJECTILES OR MISSILES FROM BARRELS, e.g. CANNONS; LAUNCHERS FOR ROCKETS OR TORPEDOES; HARPOON GUNS
    • F41F3/00—Rocket or torpedo launchers
    • F41F3/04—Rocket or torpedo launchers for rockets
    • F41F3/0413—Means for exhaust gas disposal, e.g. exhaust deflectors, gas evacuation systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41F—APPARATUS FOR LAUNCHING PROJECTILES OR MISSILES FROM BARRELS, e.g. CANNONS; LAUNCHERS FOR ROCKETS OR TORPEDOES; HARPOON GUNS
    • F41F3/00—Rocket or torpedo launchers
    • F41F3/04—Rocket or torpedo launchers for rockets
    • F41F3/073—Silos for rockets, e.g. mounting or sealing rockets therein

Definitions

  • Shutter system for a gas evacuation duct of a missile launcher Shutter system for a gas evacuation duct of a missile launcher.
  • the subject of the invention is that of missile launchers. More particularly, the invention relates to a shutter system of the evacuation gas conduit propulsion equipment launcher.
  • a missile launcher for example a launcher disposed vertically in the hull of a carrier ship, comprises two parallel rows of containers located above a common duct. exhaust gas.
  • the rows of containers are separated from each other by a central stack arranged vertically.
  • the exhaust stack is in communication with the exhaust duct and, at its upper end, it is in communication with the atmosphere through a mouth equipped with a shutter door the chimney and can be opened. This door is necessary to ensure the integrity of the launcher in a marine environment of use.
  • the propellant gases are evacuated through the bottom of the container which is placed in communication with the gas evacuation pipe by the opening of a lid located on the bottom of the container.
  • a flow is then created, as indicated by the arrow in Figure 1, from the inside of the container to the exhaust duct, then to the atmosphere via the chimney whose door is open.
  • the chimney door is actuated in opening when firing a missile. More specifically, a first control signal is transmitted towards an actuating system for moving the door in opening. Once the missile has been fired and the propellant gases have been exhausted from the interior of the launcher, a second control signal is sent to the actuation system for movement of the closing door.
  • the opening time of the door is taken into account, opening it sufficiently early before the firing of the missile to be fully open at this time.
  • the overpressure in the extraction chimney is caused either by the propulsion gases of a deliberately fired missile or by untimely emissions of gas.
  • a chimney door according to the prior art is equipped with a panel serving as a fuse holder. This panel is ejected in the case of too high overpressure prevailing in the chimney.
  • the dimensioning of the panel fuse holder is complex. It is done following a series of calibrations by estimating the parameters of a characteristic untimely emission. In particular, this panel must be adapted to the flow parameters (flow, pressure, etc.) of such untimely emission.
  • Each valve is recalled, from its open position to its closed position, by a spring biasing means.
  • the flaps In the closed position, the flaps rest on the upper edge of a support sleeve of the flaps surrounding the mouth of the chimney.
  • valves cover the entire length of the launcher, they have a large mass. They are then too abruptly opening and closing too fast. When the valve returns to abutment against the sleeve, shocks are generated. In addition, the inertia of the valve makes it oscillates, with a large amplitude, between the open and closed positions. This uncontrolled behavior of the valves leads to gas choking phenomena inside the chimney and premature deterioration of the device.
  • an additional protection element must be placed around the sleeve to protect the shutter device seawater packets, and have a height sufficient to channel the gas s 'flowing through the mouth of the chimney to prevent them from flowing laterally and jeopardize the launch of the missile.
  • the common axis of pivoting valves is located in the center of the flow of propellant gases discharged through the chimney. The invention therefore aims to solve the aforementioned problems, and in particular those related to the ejection of a panel during a gas emission inadvertent.
  • the invention relates to a closure system for the chimney of a missile launcher, the launcher comprising at least one container adapted to receive at least one missile, and a propulsion gas evacuation pipe comprising a chimney of extraction of the gas, the container being in communication with the pipe during firing of the missile and the pipe being in communication with the atmosphere via the chimney equipped with the shutter system.
  • the closure system comprises at least one panel and a panel retaining means, movable between a closed position and an open position, the retaining means comprising a means for returning the position of opening towards the closed position and energy dissipation means resulting from the opening movement and the closing movement, the closure system being adapted so that:
  • the panel When launching a missile or the inadvertent emission of gas, the panel moves to the open position as soon as the overpressure of the gases is greater than an overpressure opening threshold, the opening time moving panel being fast, less than 1 second; and or,
  • the closure system comprises one or more of the following characteristics, taken separately or in any technically possible combination:
  • the retaining means is mechanically equivalent to the parallel association of a biasing element and an energy dissipating element.
  • the shutter system comprises at least one panel coupled by a hinge-type connection with a frame in the vicinity of one end of the chimney, and at least one retaining means whose one end is coupled by a first pivot connection to frame and a second end is coupled by a second pivot connection to the panel, the axes of the first and second pivot links being parallel and distinct from the axis of the hinge type connection.
  • the retaining means is housed inside a volume defined by the frame and the panel in the closed position.
  • the retaining means comprises at least one viscoelastic damper.
  • the damper includes a viscoelastic gum.
  • the shutter system comprises two rectangular panels, each panel being coupled to a pair of retaining means.
  • the closure system according to the invention is passive. It opens when an overpressure exerts sufficient force on the panels and closes with return means when the excess pressure fades. It is therefore an automatic operation.
  • the shutter system according to the invention is robust and requires reduced maintenance, which is significant in the maritime context of use of such launchers.
  • the automatic opening allows operation not only when the overpressure is due to a desired emission of gas, but also during an uncontrollable untimely emission.
  • the shutter system according to the invention then makes it possible to dispense with a fuse holder. Consequently, all the problems inherent in such a fuse holder and in particular the initial phase of calibration of the characteristics thereof are avoided. Finally, the shutter system of the chimney according to the invention is easy to implement, even on existing launchers, and this at a lower cost.
  • FIG. 1 is a schematic sectional view of a missile launcher
  • FIG. 2 is a side view of an embodiment of the shutter system of the chimney according to the invention, the panels being in the closed position;
  • FIG. 3 is a side view, similar to that of Figure 2, the panels being here in the open position;
  • FIG. 4 is a top view, partial, of the closure system of Figure 3.
  • FIG. 5 is a functional representation of the retaining means of a panel
  • FIG. 1 A general description of the operating principle of the passive and automatic sealing system according to the invention will now be made with reference to FIG. 1, on which is shown, schematically, a launcher 1 placed on the deck 15 of a carrier ship .
  • the launcher 1 comprises two containers 2 and 3 respectively containing a missile 4, 5.
  • the container 2, respectively the container 3, is closed by doors 6 located in its upper part, in the simplifying hypothesis of a vertical positioning of the launcher.
  • the doors 6 of the container 2, respectively of the container 3, are open in launch phase of the missile 4, 5.
  • the bottom of the container 2, respectively 3, is equipped with an orifice 7 allowing the flow of propellant gases since the inside the container 2, 3 towards a gas evacuation pipe 10.
  • the exhaust gas duct 10 is common to all the containers of the launcher 1.
  • the duct 10 comprises a central chimney 1 1, arranged vertically between the containers 2 and 3, and which drives the propulsion gases to the outside atmosphere.
  • the upper end, on the atmospheric side, of the chimney 11, hereinafter referred to as the mouth 9, is equipped with the shut-off system 14 which is adapted to open as soon as an overpressure inside the chimney 11 exceeds an overpressure opening threshold, and to close when the overpressure returns below a closing threshold surge.
  • the mouth 9 of the chimney 11 has the shape of an elongated rectangle whose longitudinal axis is located in the plane P of symmetry.
  • the closure system 14 comprises a frame 20, two panels 12 and 13 pivoting, and four dampers as retaining means coupling in pairs each panel 12 or 13 to the frame 20.
  • the frame 20 frames the mouth 9. It comprises two lateral walls 22 and 23 arranged parallel to the plane P, on either side of the mouth 9. It also comprises two pairs of end walls respectively disposed at each of the longitudinal ends. of the mouth 9, between the side walls 22 and 23, perpendicular to the plane P.
  • a single pair of end walls 25 and 26 is shown, in plan view, in Figure 4: a first wall 25 is located in the vicinity the end of the mouth 9; and a second wall 26 is located away from the end of the mouth 9.
  • An end wall, such as the wall 25, has a generally triangular shape, the base of which rests on a bottom wall 24 of the frame 20 disposed on the bridge 15 and whose apex, opposite the base, is in the plane P.
  • the panel 12, respectively the panel 13, is a rectangular surface of substantially constant thickness e.
  • the panel 12, 13 has an outer wall 121, 131, an inner wall 123, 133 and peripheral edges.
  • Each panel 12, respectively 13 is fixed to the side wall 22, 23 of the frame 20 by means of a hinge-type connection 32, 33 integral with the longitudinal peripheral edge 124, 134 of the panel 12, 13.
  • the panel 12, 13 can be moved between a closed position and an open position, by pivoting about the axis A, A 'of the hinge connection 32, 33.
  • Each panel 12, 13 is intended to cover half of the section of the mouth 9 divided along the plane P.
  • the longitudinal peripheral edge 122 of the panel 12, peripheral edge opposite the longitudinal edge 124 carrying the hinge 32, is able to bear against the peripheral edge 132 of the panel 13, peripheral longitudinal edge opposite the peripheral longitudinal wall 134 carrying the hinge 33.
  • the peripheral longitudinal edges 122 and 132 are in the plane P and are in contact with one another so as to seal the mouth 9.
  • the inner wall 123 of the panel 12, respectively 133 of the panel 13, at its longitudinal ends rests both on the inclined sides of the end walls 25 and 26 of the frame 20 but also on abutments 28a and 28b, respectively 29a and 29b, disposed on the first and second end walls 25 and 26.
  • each peripheral longitudinal edge 122, 132 is at an angle with the inner wall 123, 133 of the associated panel.
  • the longitudinal end of the inner wall 123, 133 of the panel 12, respectively of the panel 13, is provided with a pair of grooves 128a and 128b, 129a and 129b.
  • each groove is intended to receive one of the inclined sides of the first and second end walls 25 and 26. This ensures a precise positioning of the panels when they fold down and a good seal in the closing position.
  • the abutments 28a and 28b, 29a and 29b are arranged slightly recessed with respect to the inclined sides of the end walls 25 and 26.
  • each panel 12, 13 is substantially parallel to the plane P, at right angles to the bridge 15, in the extension of the wall 22, 23 of the frame 20 on which it is fixed.
  • the panels 12 and 13 being disposed on either side of the mouth of the chimney, the ejected gases are channeled vertically. In particular, they do not flow laterally towards the missile being launched. This avoids an additional piece serving as a side screen ejected gas.
  • the panels 12 and 13 have a length slightly greater than the length of the mouth 9. They extend between the second end walls 25 of the frame 20 which are the end walls furthest from the mouth 9 Thus, the panels 12 and 13 cover areas of the bridge 15 located on either side of the mouth 9.
  • the panels 12 and 13, the pair of walls 25 and 26 and the bridge 15 thus delimit a volume 17 forming a housing for a damper 18 of the panel 12 and a damper 19 of the panel 13.
  • another volume (not shown), located on the side of the other longitudinal end of the mouth 9, forms a housing for the other damper of the panel 12 and the other damper of the panel 13.
  • Each damper 18, 19 is a viscoelastic rubber damper in the form of a cylinder 181, 191 and a rod 182, 192 slidable inside the cylinder 181, 191.
  • the cylinder 181, 192 comprises means known to those skilled in the art to provide a function of returning the extended position to the retracted position, and a function of dissipating the energy of the movement between the two positions, extended and retracted.
  • the cylinder 181 is coupled to the side wall 23 of the frame 20 by a pivot connection
  • the end of the cylinder 181, opposite the rod 182, comprises two lugs 186 and 187, diametrically opposed, disposed on the outer wall of the body of the cylinder 181.
  • Support parts 231 and 232 are fixed, for example by welding, to right angle on the side wall 23 and on the bottom 24 of the frame 20, so as to be disposed on either side of the body of the cylinder 181.
  • the lugs 186 and 187 are received in corresponding bores formed in both support pieces 231 and 232 to form the pivot connection 183.
  • the end of the rod 182, opposite the cylinder 181, is secured to the panel 12 by a pivot connection 184 of axis B.
  • the end of the rod 182 comprises a clevis portion inserted between two ears 126 and 127
  • the shank 185 of the pivot connection 184 is inserted through the aligned bore of the lug 126, the clevis of the shank 182 and the lug 127.
  • the axes B and B 'of the pivot links 184 and 183 are parallel, but distinct, from the axis A of the hinge connection 24 around which the panel 12 rotates.
  • the damper 19 of the panel 13, articulated around the axes C and C of the pivot links 193 and 194, is similar to the damper which has just been described. Also, it will not be described in detail, but it will be noted simply that the dampers 18 and 19 are placed "head to tail" in the housing 17.
  • FIG. 5 schematically represents a mechanical equivalent of the retaining means that may be suitable for the invention.
  • the hinge connection 32 between the frame 20 and the panel 12.
  • the pivot connection 183 between the frame 20 and the retaining means 18 and the pivot connection 184 between the retaining means 18 and the panel 12.
  • the retaining means 18 is equivalent to the parallel association of a return element 18a and a dissipation element 18b.
  • the retaining means used are constituted by a viscoelastic rubber damper 18, 19. Shocks of this type are known and are for example marketed by the company DOMANGE JARRET. However, other types of retaining means could be used as soon as they have the functions shown schematically in FIG. 5. It will be noted that the return element converts a kinetic energy or a work into a potential energy. that he can then restore. Any mechanical device that can have these physical properties may be suitable for the invention. This is particularly the case of a spring that stores energy in the form of elongation or compression.
  • the retaining means may take the form of a hydraulic cylinder, as a dissipation element, associated with a spring, as a return element, operating in extension or in compression depending on the positioning of the spring on the rod of the hydraulic cylinder.
  • the panel 12, respectively the panel 13 has a length of 2200 mm and a width of 170 mm leading to a surface of 0.4 m 2 .
  • the panel 12, 13 has a thickness e for example of 30 mm.
  • the mass of the panel 12, 13 is thus of the order of 80 kg.
  • the overpressure typically 2.9 bar, generates an opening taking place in an opening time of 0.04 s.
  • the role of the damper 18 is to brake the panel 12 when it approaches its position at 90 ° so as to prevent rebounds and to avoid oscillations around this final position.
  • the dissipation element 18b of the damper 18 acts by dissipating a fraction of the mechanical work of rotation of the panel 12 produced by the overpressure.
  • the other fraction of the mechanical work is absorbed by the return element 18a of the damper 18.
  • the characteristic constants of the equivalent recall and dissipation elements are determined to obtain a slow closure typically of the order of one minute and 2 minutes in the digital application selected. They are also determined to define a threshold value of the overpressure at the opening and for a threshold value of the overpressure at closing.
  • the damping means may be located outside the volume 17.
  • the return means are then coupled with the outer face 124, respectively 134 of the panel 12, 13. But they are then exposed to external aggression.
  • Another variant would be to couple not the rod 182 of the return means 18 to the panel 12, but the cylinder portion 181.
  • the invention is not limited to a closure system for a launcher arranged vertically, provided with a central chimney.
  • the relative orientation of the launcher, as well as the orientation and the disposition of the chimney with respect to the containers, can be modified without departing from the scope of the invention.
  • the means used are all passive so that the shutter system of the invention does not require a power source to operate. All this gives it great strength and increased operational safety. Above all, the shutter system described operates automatically not only in the desired trigger mode, that is to say when the gases come from the controlled firing of a missile, but also during an untimely emission of gas.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Toys (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

This shutter system (14) for the barrel of a missile launcher, the launcher (1) comprising at least one container (2, 3) capable of accommodating at least one missile (4, 5) and a pipe (10) for discharging the propulsion gases comprising a gas extraction barrel (11), the container being in communication with the pipe when the missile is fired and the pipe being in communication with the atmosphere (12) via the barrel equipped with the said shutter system, is characterized in that the shutter system comprises at least one panel (12, 13) and a panel retaining means (18, 19), able to move between a closed position and an open position, the retaining means comprising a means (18a) of return from the open position to the closed position and a means (18b) of dissipating the energy resulting from the opening movement and the closing movement.

Description

Système d'obturation d'un conduit d'évacuation des gaz d'un lanceur de missiles. Shutter system for a gas evacuation duct of a missile launcher.
L'invention a pour domaine celui des lanceurs de missiles. Plus particulièrement, l'invention est relative à un système d'obturation du conduit d'évacuation des gaz de propulsion équipant le lanceur.The subject of the invention is that of missile launchers. More particularly, the invention relates to a shutter system of the evacuation gas conduit propulsion equipment launcher.
De manière générale, comme cela est représenté sur la figure 1 en annexe, un lanceur de missiles, par exemple un lanceur disposé verticalement dans la coque d'un navire porteur, comporte deux rangées parallèles de conteneurs situés au-dessus d'un conduit commun d'évacuation des gaz. Les rangées de conteneurs sont séparées l'une de l'autre par une cheminée centrale disposée verticalement. Au niveau de son extrémité inférieure, la cheminée d'évacuation est en communication avec le conduit d'évacuation et, au niveau de son extrémité supérieure, elle est en communication avec l'atmosphère au travers d'une bouche équipée d'une porte obturant la cheminée et pouvant être ouverte. Cette porte est nécessaire pour assurer l'intégrité du lanceur dans un environnement marin d'utilisation.In general, as shown in FIG. 1 in the appendix, a missile launcher, for example a launcher disposed vertically in the hull of a carrier ship, comprises two parallel rows of containers located above a common duct. exhaust gas. The rows of containers are separated from each other by a central stack arranged vertically. At its lower end, the exhaust stack is in communication with the exhaust duct and, at its upper end, it is in communication with the atmosphere through a mouth equipped with a shutter door the chimney and can be opened. This door is necessary to ensure the integrity of the launcher in a marine environment of use.
Lors du tir volontaire d'un missile contenu dans l'un des conteneurs, les gaz de propulsion sont évacués par le fond du conteneur qui est mis en communication avec le conduit d'évacuation des gaz par l'ouverture d'un opercule situé sur le fond du conteneur. Un écoulement est alors créé, comme l'indique la flèche de la figure 1 , depuis l'intérieur du conteneur vers le conduit d'évacuation, puis vers l'atmosphère via la cheminée dont la porte est ouverte.During the deliberate fire of a missile contained in one of the containers, the propellant gases are evacuated through the bottom of the container which is placed in communication with the gas evacuation pipe by the opening of a lid located on the bottom of the container. A flow is then created, as indicated by the arrow in Figure 1, from the inside of the container to the exhaust duct, then to the atmosphere via the chimney whose door is open.
Selon l'art antérieur, la porte de la cheminée est actionnée en ouverture au moment du tir d'un missile. Plus précisément, un premier signal de commande est émis en direction d'un système d'actionnement pour le déplacement de la porte en ouverture. Une fois que le missile a été tiré et que les gaz de propulsion ont été évacués de l'intérieur du lanceur, un second signal de commande est envoyé au système d'actionnement pour le déplacement de la porte en fermeture.According to the prior art, the chimney door is actuated in opening when firing a missile. More specifically, a first control signal is transmitted towards an actuating system for moving the door in opening. Once the missile has been fired and the propellant gases have been exhausted from the interior of the launcher, a second control signal is sent to the actuation system for movement of the closing door.
Dans ce mode de fonctionnement connu, le temps d'ouverture de la porte est pris en compte, en ouvrant celle-ci suffisamment tôt avant la mise à feu du missile pour qu'elle soit totalement ouverte à cet instant.In this known mode of operation, the opening time of the door is taken into account, opening it sufficiently early before the firing of the missile to be fully open at this time.
La surpression dans la cheminée d'extraction est causée soit par les gaz de propulsion d'un missile volontairement mis à feu, soit par des émissions intempestives de gaz. Pour tenir compte de tels événements, une porte de cheminée selon l'art antérieur est munie d'un panneau servant de porte-fusible. Ce panneau est éjecté dans le cas d'une surpression trop élevée régnant dans la cheminée.The overpressure in the extraction chimney is caused either by the propulsion gases of a deliberately fired missile or by untimely emissions of gas. To take account of such events, a chimney door according to the prior art is equipped with a panel serving as a fuse holder. This panel is ejected in the case of too high overpressure prevailing in the chimney.
Suite à une émission intempestive et à l'éjection du panneau, il est nécessaire d'intervenir sur le lanceur pour remplacer ce panneau. De plus, le dimensionnement du panneau formant porte-fusible est complexe. Il se fait à la suite d'une série de calibrations en estimant les paramètres d'une émission intempestive caractéristique. En particulier, il faut adapter ce panneau aux paramètres d'écoulement (débit, pression, etc.) d'une telle émission intempestive.Following an untimely emission and the ejection of the panel, it is necessary to intervene on the launcher to replace this panel. In addition, the dimensioning of the panel fuse holder is complex. It is done following a series of calibrations by estimating the parameters of a characteristic untimely emission. In particular, this panel must be adapted to the flow parameters (flow, pressure, etc.) of such untimely emission.
Enfin, de tels panneaux présentent le défaut supplémentaire de ne pas offrir la sécurité de fonctionnement recherchée pour de tels équipements. Il est ainsi possible que les moyens de fixation du panneau présentent un défaut empêchant l'éjection pour la valeur seuil de surpression prévue. Dans des situations extrêmes, le panneau n'est pas du tout éjecté et la surpression dans le lanceur est maintenue, conduisant à une détérioration des missiles. On connaît, par le document EP 0 481 851 A1 , un dispositif d'obturation qui équipe la bouche d'une cheminée d'un lanceur comportant plusieurs cheminées distinctes les unes des autres et à section transversale circulaire. Le dispositif d'obturation comporte deux clapets légers pivotant autour d'un axe commun horizontal situé dans le plan médian de symétrie de la cheminée. Les clapets s'ouvrent sous l'effet de la sur- pression causée par les gaz de mise à feu volontaire d'un missile ou par un allumage intempestif. Chaque clapet est rappelé, depuis sa position d'ouverture vers sa position de fermeture, par un moyen de rappel formant ressort. En position de fermeture, les clapets reposent sur le bord supérieur d'un manchon support des clapets entourant la bouche de la cheminée. Bien que ce document indique la possibilité d'utiliser le dispositif décrit pour un lanceur comportant une unique cheminée centrale, il s'avère, dans la pratique, que ce mode de réalisation présente différents inconvénients.Finally, such panels have the additional defect of not providing the desired operating safety for such equipment. It is thus possible that the panel fixing means have a defect preventing the ejection for the expected threshold value of overpressure. In extreme situations, the panel is not ejected at all and the overpressure in the launcher is maintained, leading to a deterioration of the missiles. Document EP 0 481 851 A1 discloses a closure device which equips the mouth of a chimney of a launcher comprising several chimneys distinct from one another and of circular cross-section. The shutter device comprises two lightweight valves pivoting about a horizontal common axis located in the median plane of symmetry of the chimney. The valves open under the effect of the overpressure caused by the deliberate firing gases of a missile or inadvertent ignition. Each valve is recalled, from its open position to its closed position, by a spring biasing means. In the closed position, the flaps rest on the upper edge of a support sleeve of the flaps surrounding the mouth of the chimney. Although this document indicates the possibility of using the device described for a launcher having a single central chimney, it turns out, in practice, that this embodiment has different disadvantages.
En particulier, lorsque les clapets couvrent l'intégralité de la longueur du lanceur, ils ont une masse importante. Ils sont alors d'une ouverture trop brutale et d'une ferme- ture trop rapide. Lorsque le clapet revient en butée contre le manchon, des chocs sont générés. Par ailleurs, l'inertie du clapet fait qu'il oscille, avec une forte amplitude, entre les positions ouverte et fermée. Ce comportement incontrôlé des clapets conduit à des phénomènes d'étouffement des gaz à l'intérieur de la cheminée et à une détérioration prématurée du dispositif.In particular, when the valves cover the entire length of the launcher, they have a large mass. They are then too abruptly opening and closing too fast. When the valve returns to abutment against the sleeve, shocks are generated. In addition, the inertia of the valve makes it oscillates, with a large amplitude, between the open and closed positions. This uncontrolled behavior of the valves leads to gas choking phenomena inside the chimney and premature deterioration of the device.
De plus, selon ce document de l'état de la technique, un élément de protection supplémentaire doit être disposé autour du manchon pour protéger le dispositif d'obturation des paquets d'eau de mer, et avoir une hauteur suffisante pour canaliser les gaz s'écoulant à travers la bouche de la cheminée afin d'éviter qu'ils ne s'écoulent latéralement et compromettent le lancement du missile. Incidemment, l'axe commun de pivotement des clapets est situé au centre de l'écoulement des gaz de propulsion évacués par la cheminée. L'invention a donc pour but de résoudre les problèmes précités, et en particulier ceux liés à l'éjection d'un panneau lors d'une émission de gaz intempestive.In addition, according to this document of the state of the art, an additional protection element must be placed around the sleeve to protect the shutter device seawater packets, and have a height sufficient to channel the gas s 'flowing through the mouth of the chimney to prevent them from flowing laterally and jeopardize the launch of the missile. Incidentally, the common axis of pivoting valves is located in the center of the flow of propellant gases discharged through the chimney. The invention therefore aims to solve the aforementioned problems, and in particular those related to the ejection of a panel during a gas emission inadvertent.
L'invention a pour objet un système d'obturation pour cheminée d'un lanceur de missiles, le lanceur comportant au moins un conteneur apte à recevoir au moins un missile, et une conduite d'évacuation des gaz de propulsion comportant une cheminée d'extraction des gaz, le conteneur étant en communication avec la conduite lors du tir du missile et la conduite étant en communication avec l'atmosphère via la cheminée équipée du système d'obturation.The invention relates to a closure system for the chimney of a missile launcher, the launcher comprising at least one container adapted to receive at least one missile, and a propulsion gas evacuation pipe comprising a chimney of extraction of the gas, the container being in communication with the pipe during firing of the missile and the pipe being in communication with the atmosphere via the chimney equipped with the shutter system.
Selon l'invention, le système d'obturation comporte au moins un panneau et un moyen de retenue du panneau, mobile entre une position de fermeture et une position d'ouverture, le moyen de retenue comportant un moyen de rappel de la position d'ouverture vers la position de fermeture et un moyen de dissipation d'énergie résultant du mouvement d'ouverture et du mouvement de fermeture, le système d'obturation étant adapté pour que :According to the invention, the closure system comprises at least one panel and a panel retaining means, movable between a closed position and an open position, the retaining means comprising a means for returning the position of opening towards the closed position and energy dissipation means resulting from the opening movement and the closing movement, the closure system being adapted so that:
- Lors du lancement d'un missile ou de l'émission intempestive de gaz, le pan- neau se déplace vers la position d'ouverture dès que la surpression des gaz est supérieure à une surpression seuil d'ouverture, le temps d'ouverture du panneau mobile étant rapide, inférieur à 1 seconde ; et/ou,- When launching a missile or the inadvertent emission of gas, the panel moves to the open position as soon as the overpressure of the gases is greater than an overpressure opening threshold, the opening time moving panel being fast, less than 1 second; and or,
- Lors du rééquilibrage des pressions dans la cheminée et l'atmosphère, le panneau se déplace vers la position de fermeture dès que la surpression des gaz est infé- rieure à une surpression seuil de fermeture, le temps de fermeture du panneau mobile étant lent, supérieur à 5 secondes, de préférence supérieur à 30 secondes. Suivant des modes particuliers de réalisation, le système d'obturation comporte une ou plusieurs des caractéristiques suivantes, prise(s) isolément ou suivant toutes les combinaisons techniquement possibles :- When rebalancing pressures in the chimney and the atmosphere, the panel moves to the closed position as soon as the overpressure of the gases is lower than an overpressure closing threshold, the closure time of the movable panel being slow, greater than 5 seconds, preferably greater than 30 seconds. According to particular embodiments, the closure system comprises one or more of the following characteristics, taken separately or in any technically possible combination:
- Le moyen de retenue est équivalent mécaniquement à l'association en parallèle d'un élément de rappel et d'un élément de dissipation d'énergie.- The retaining means is mechanically equivalent to the parallel association of a biasing element and an energy dissipating element.
- Le système d'obturation comporte au moins un panneau couplé par une liaison du type charnière avec un bâti au voisinage d'une extrémité de la cheminée, et au moins un moyen de retenue dont une première extrémité est couplée par une première liaison pivot au bâti et une seconde extrémité est couplée par une seconde liaison pivot au panneau, les axes des première et deuxième liaisons pivot étant parallèles et distincts de l'axe de la liaison de type charnière.- The shutter system comprises at least one panel coupled by a hinge-type connection with a frame in the vicinity of one end of the chimney, and at least one retaining means whose one end is coupled by a first pivot connection to frame and a second end is coupled by a second pivot connection to the panel, the axes of the first and second pivot links being parallel and distinct from the axis of the hinge type connection.
- Le moyen de retenue est logé à l'intérieur d'un volume délimité par le bâti et le panneau en position fermée.- The retaining means is housed inside a volume defined by the frame and the panel in the closed position.
- Le moyen de retenue comporte au moins un amortisseur viscoélastique. - L'amortisseur comporte une gomme viscoélastique.- The retaining means comprises at least one viscoelastic damper. - The damper includes a viscoelastic gum.
- Le système d'obturation comporte deux panneaux rectangulaires, chaque panneau étant couplé à une paire de moyens de retenue.- The shutter system comprises two rectangular panels, each panel being coupled to a pair of retaining means.
- Le bâti est muni de butées déterminant la position de fermeture du panneau. Avantageusement, le système d'obturation selon l'invention est passif. Il s'ouvre lorsqu'une surpression exerce une force suffisante sur les panneaux et se ferme grâce à des moyens de rappel lorsque cette surpression s'évanouie. Il s'agit donc d'un fonctionnement automatique.- The frame is provided with stops determining the closed position of the panel. Advantageously, the closure system according to the invention is passive. It opens when an overpressure exerts sufficient force on the panels and closes with return means when the excess pressure fades. It is therefore an automatic operation.
On se dispense ainsi de toute la chaîne d'actionnement (actionneur, source de courant, amplificateur de courant, moteur, etc.) nécessaire au fonctionnement des por- tes selon l'art antérieur. Le système d'obturation selon l'invention est robuste et nécessite un entretien réduit, ce qui est appréciable dans le contexte maritime d'utilisation de tels lanceurs.This dispenses with the entire actuation chain (actuator, current source, current amplifier, motor, etc.) necessary for the operation of the gates according to the prior art. The shutter system according to the invention is robust and requires reduced maintenance, which is significant in the maritime context of use of such launchers.
Avantageusement, l'ouverture automatique permet un fonctionnement non seulement lorsque la surpression a pour cause une émission voulue de gaz, mais égale- ment lors d'une émission intempestive incontrôlable.Advantageously, the automatic opening allows operation not only when the overpressure is due to a desired emission of gas, but also during an uncontrollable untimely emission.
Le système d'obturation selon l'invention permet alors de se passer d'une porte- fusible. En conséquence, on évite tous les problèmes inhérents à une telle porte-fusible et en particulier la phase initiale de calibration des caractéristiques de celle-ci. Enfin, le système d'obturation de la cheminée selon l'invention est d'une mise en œuvre aisée, même sur des lanceurs existants, et ceci à un moindre coût.The shutter system according to the invention then makes it possible to dispense with a fuse holder. Consequently, all the problems inherent in such a fuse holder and in particular the initial phase of calibration of the characteristics thereof are avoided. Finally, the shutter system of the chimney according to the invention is easy to implement, even on existing launchers, and this at a lower cost.
Le système de portes selon l'invention est donc robuste, fiable, et assure une très grande sécurité de fonctionnement du lanceur. L'invention et ses avantages seront mieux compris à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés sur lesquels :The door system according to the invention is therefore robust, reliable, and ensures a very high operational safety of the launcher. The invention and its advantages will be better understood on reading the description which follows, given solely by way of example and with reference to the appended drawings, in which:
- la figure 1 est une vue schématique en coupe d'un lanceur de missiles ;- Figure 1 is a schematic sectional view of a missile launcher;
- la figu re 2 est u ne vue de côté d 'u n mode de réalisation du système d'obturation de la cheminée selon l'invention, les panneaux étant en position de fermeture ;FIG. 2 is a side view of an embodiment of the shutter system of the chimney according to the invention, the panels being in the closed position;
- la figure 3 est une vue de côté, similaire à celle de la figure 2, les panneaux étant ici en position ouverte ;- Figure 3 is a side view, similar to that of Figure 2, the panels being here in the open position;
- la figure 4 est une vue de dessus, partielle, du système d'obturation de la figure 3 ; et,- Figure 4 is a top view, partial, of the closure system of Figure 3; and,
- la figure 5 est une représentation fonctionnelle des moyens de retenue d'un panneau ;- Figure 5 is a functional representation of the retaining means of a panel;
Une description générale du principe de fonctionnement du système d'obturation passif et automatique selon l'invention va maintenant être faite en référence à la figure 1 , sur laquelle est représenté, schématiquement, un lanceur 1 placé sur le pont 15 d'un navire porteur. De chaque côté d'un plan P de symétrie, le lanceur 1 comporte deux conteneurs 2 et 3 contenant respectivement un missile 4, 5. Le conteneur 2, respectivement le conteneur 3, est fermé par des portes 6 situées dans sa partie supérieure, dans l'hypothèse simplificatrice d'un positionnement vertical du lanceur. Les portes 6 du conteneur 2, respectivement du conteneur 3, sont ouvertes en phase de lancement du missile 4, 5. Le fond du conteneur 2, respectivement 3, est équipé d'un orifice 7 permettant l'écoulement des gaz de propulsion depuis l'intérieur du conteneur 2, 3 vers un conduit d'évacuation des gaz 10.A general description of the operating principle of the passive and automatic sealing system according to the invention will now be made with reference to FIG. 1, on which is shown, schematically, a launcher 1 placed on the deck 15 of a carrier ship . On each side of a plane P of symmetry, the launcher 1 comprises two containers 2 and 3 respectively containing a missile 4, 5. The container 2, respectively the container 3, is closed by doors 6 located in its upper part, in the simplifying hypothesis of a vertical positioning of the launcher. The doors 6 of the container 2, respectively of the container 3, are open in launch phase of the missile 4, 5. The bottom of the container 2, respectively 3, is equipped with an orifice 7 allowing the flow of propellant gases since the inside the container 2, 3 towards a gas evacuation pipe 10.
Le conduit d'évacuation des gaz 10 est commun à l'ensemble des conteneurs du lanceur 1 . Le conduit 10 comporte une cheminée 1 1 centrale, disposée verticalement entre les conteneurs 2 et 3, et qui permet de conduire les gaz de propulsion vers l'atmosphère extérieure. L'extrémité supérieure, du côté de l'atmosphère, de la cheminée 11 , ci-après dénommée bouche 9, est équipée du système d'obturation 14 qui est adapté pour s'ouvrir dès qu'une surpression à l'intérieur de la cheminée 11 dépasse une surpression seuil d'ouverture, et pour se refermer lorsque la surpression repasse en dessous d'une sur- pression seuil de fermeture.The exhaust gas duct 10 is common to all the containers of the launcher 1. The duct 10 comprises a central chimney 1 1, arranged vertically between the containers 2 and 3, and which drives the propulsion gases to the outside atmosphere. The upper end, on the atmospheric side, of the chimney 11, hereinafter referred to as the mouth 9, is equipped with the shut-off system 14 which is adapted to open as soon as an overpressure inside the chimney 11 exceeds an overpressure opening threshold, and to close when the overpressure returns below a closing threshold surge.
En position d'ouverture du système d'obturation 14, une communication entre la cheminée 11 et l'atmosphère 12 est établie permettant l'écoulement des gaz de propulsion depuis le conduit 10 vers l'extérieur du lanceur 1. Une fois que le missile a été tiré et qu'il est sorti du conteneur correspondant, l'écoulement s'arrête. Les pressions à l'intérieur du conteneur, du conduit d'évacuation et de la cheminée s'équilibrent avec la pression atmosphérique. La surpression à l'origine de l'ouverture du système d'obturation 14 diminue et passe en dessous du seuil de fermeture. Le système d'obturation se referme alors automatiquement. Il reprend sa position par défaut dans laquelle le conduit 10 est hermétiquement fermé. Un mode de réalisation préférentiel du système d'obturation 14 va maintenant être décrit en détails en se reportant aux figures 2 à 4.In the open position of the closure system 14, a communication between the stack 11 and the atmosphere 12 is established allowing the propulsion gases to flow from the conduit 10 to the outside of the launcher 1. Once the missile was pulled out and out of the corresponding container, the flow stops. The pressures inside the container, the flue and the chimney are balanced with the atmospheric pressure. The overpressure at the origin of the opening of the closure system 14 decreases and falls below the closure threshold. The shutter system then closes automatically. It resumes its default position in which the conduit 10 is hermetically closed. A preferred embodiment of the closure system 14 will now be described in detail with reference to FIGS. 2 to 4.
Dans le plan horizontal du pont 15 du navire, parallèle au plan de la figure 4, la bouche 9 de la cheminée 11 a la forme d'un rectangle allongé dont l'axe longitudinal est situé dans le plan P de symétrie. Le système d'obturation 14 comporte un bâti 20, deux panneaux 12 et 13 pivotants, et quatre amortisseurs en tant que moyens de retenue couplant par paire chaque panneau 12 ou 13 au bâti 20.In the horizontal plane of the deck 15 of the ship, parallel to the plane of Figure 4, the mouth 9 of the chimney 11 has the shape of an elongated rectangle whose longitudinal axis is located in the plane P of symmetry. The closure system 14 comprises a frame 20, two panels 12 and 13 pivoting, and four dampers as retaining means coupling in pairs each panel 12 or 13 to the frame 20.
Le bâti 20 encadre la bouche 9. Il comporte deux parois latérales 22 et 23 disposées parallèlement au plan P, de part et d'autre de la bouche 9. Il comporte également deux paires de parois d'extrémité respectivement disposées à chacune des extrémités longitudinales de la bouche 9, entre les parois latérales 22 et 23, perpendiculairement au plan P. Une seule paire de parois d'extrémité 25 et 26 est représentée, en vue de dessus, sur la figure 4 : une première paroi 25 est située au voisinage de l'extrémité de la bouche 9 ; et une seconde paroi 26 est située à l'écart de l'extrémité de la bouche 9. Une paroi d'extrémité, telle que la paroi 25, a une forme généralement triangulaire, dont la base repose sur une paroi de fond 24 du bâti 20 disposée sur le pont 15 et dont le sommet, opposé à la base, se situe dans le plan P. Le panneau 12, respectivement le panneau 13, est une surface rectangulaire d'épaisseur e sensiblement constante. Le panneau 12, 13 comporte une paroi externe 121 , 131 , une paroi interne 123, 133 et des bords périphériques.The frame 20 frames the mouth 9. It comprises two lateral walls 22 and 23 arranged parallel to the plane P, on either side of the mouth 9. It also comprises two pairs of end walls respectively disposed at each of the longitudinal ends. of the mouth 9, between the side walls 22 and 23, perpendicular to the plane P. A single pair of end walls 25 and 26 is shown, in plan view, in Figure 4: a first wall 25 is located in the vicinity the end of the mouth 9; and a second wall 26 is located away from the end of the mouth 9. An end wall, such as the wall 25, has a generally triangular shape, the base of which rests on a bottom wall 24 of the frame 20 disposed on the bridge 15 and whose apex, opposite the base, is in the plane P. The panel 12, respectively the panel 13, is a rectangular surface of substantially constant thickness e. The panel 12, 13 has an outer wall 121, 131, an inner wall 123, 133 and peripheral edges.
Chaque panneau 12, respectivement 13, est fixé à la paroi latérale 22, 23 du bâti 20 au moyen d'une liaison du type charnière 32, 33 solidaire du bord périphérique longitudinal 124, 134 du panneau 12, 13. Ainsi le panneau 12, 13 peut être déplacé entre une position de fermeture et une position d'ouverture, par pivotement autour de la l'axe A, A' de la liaison charnière 32, 33.Each panel 12, respectively 13, is fixed to the side wall 22, 23 of the frame 20 by means of a hinge-type connection 32, 33 integral with the longitudinal peripheral edge 124, 134 of the panel 12, 13. Thus the panel 12, 13 can be moved between a closed position and an open position, by pivoting about the axis A, A 'of the hinge connection 32, 33.
Chaque panneau 12, 13 est destiné à couvrir la moitié de la section de la bouche 9 divisée selon le plan P.Each panel 12, 13 is intended to cover half of the section of the mouth 9 divided along the plane P.
En position de fermeture, le bord périphérique longitudinal 122 du panneau 12, bord périphérique opposé au bord longitudinal 124 portant la charnière 32, est apte à venir en appui sur le bord périphérique 132 du panneau 13, bord longitudinal périphérique opposé au paroi longitudinal périphérique 134 portant la charnière 33. Comme cela est représenté sur la figure 3, les bords longitudinaux périphériques 122 et 132 sont dans le plan P et sont en contact l'un sur l'autre de manière à obturer de façon étanche la bouche 9. En position de fermeture, la paroi interne 123 du panneau 12, respectivement 133 du panneau 13, au niveau de ses extrémités longitudinales, repose à la fois sur les côtés inclinés des parois d'extrémité 25 et 26 du bâti 20 mais également sur des butées 28a et 28b, respectivement 29a et 29b, disposées sur les première et seconde paroi d'extrémité 25 et 26.In the closed position, the longitudinal peripheral edge 122 of the panel 12, peripheral edge opposite the longitudinal edge 124 carrying the hinge 32, is able to bear against the peripheral edge 132 of the panel 13, peripheral longitudinal edge opposite the peripheral longitudinal wall 134 carrying the hinge 33. As shown in Figure 3, the peripheral longitudinal edges 122 and 132 are in the plane P and are in contact with one another so as to seal the mouth 9. In position closing, the inner wall 123 of the panel 12, respectively 133 of the panel 13, at its longitudinal ends, rests both on the inclined sides of the end walls 25 and 26 of the frame 20 but also on abutments 28a and 28b, respectively 29a and 29b, disposed on the first and second end walls 25 and 26.
Puisque les côté inclinés de ces parois d'extrémité triangulaires 25 et 26 font un angle a avec le plan P, que les parois interne 123 et 133 des panneaux 12 et 13 reposent sur ces côtés inclinées, et qu'enfin les bords périphériques longitudinaux 122 et 132 des panneaux 12 et 13 sont en appui mutuel, chaque bord longitudinal périphérique 122, 132 fait un angle a avec la paroi interne 123, 133 du panneau associé.Since the inclined sides of these triangular end walls 25 and 26 are at an angle α with the plane P, the inner walls 123 and 133 of the panels 12 and 13 rest on these inclined sides, and finally the longitudinal peripheral edges 122 and 132 panels 12 and 13 are in mutual support, each peripheral longitudinal edge 122, 132 is at an angle with the inner wall 123, 133 of the associated panel.
Avantageusement, l'extrémité longitudinale de la paroi interne 123, 133 du panneau 12, respectivement du panneau 13, est munie d'une paire de rainures 128a et 128b, 129a et 129b. En position de fermeture, chaque rainure est destinée à recevoir l'un des côtés inclinés des première et seconde parois d'extrémité 25 et 26. On assure ainsi un positionnement précis des panneaux lorsqu'ils se rabattent et une bonne étan- chéité dans la position de fermeture. Cette disposition explique la raison pour laquelle les butées 28a et 28b, 29a et 29b sont disposées légèrement en retrait par rapport aux côtés inclinés des parois d'extrémité 25 et 26.Advantageously, the longitudinal end of the inner wall 123, 133 of the panel 12, respectively of the panel 13, is provided with a pair of grooves 128a and 128b, 129a and 129b. In the closed position, each groove is intended to receive one of the inclined sides of the first and second end walls 25 and 26. This ensures a precise positioning of the panels when they fold down and a good seal in the closing position. This provision explains why the abutments 28a and 28b, 29a and 29b are arranged slightly recessed with respect to the inclined sides of the end walls 25 and 26.
En position d'ouverture, chaque panneau 12, 13 est sensiblement parallèle au plan P, à angle droit par rapport au pont 15, dans le prolongement de la paroi 22, 23 du bâti 20 sur laquelle il est fixé. Dans cette position, les panneaux 12 et 13 étant disposés de part et d'autre de la bouche de la cheminée, les gaz éjectés sont canalisés verticalement. En particulier, ils ne s'écoulent pas latéralement en direction du missile en train d'être lancé. On évite ainsi une pièce supplémentaire servant d'écran latéral aux gaz éjectés. Les panneaux 12 et 13 ont une longueur légèrement supérieure à la longueur de la bouche 9. Ils s'étendent entre les secondes parois d'extrémité 25 du bâti 20 qui sont les parois d'extrémité les plus à l'écart de la bouche 9. Ainsi, les panneaux 12 et 13 couvrent des zones du pont 15 situées de part et d'autre de la bouche 9. Les panneaux 12 et 13, la paire de parois 25 et 26 et le pont 15 délimitent donc un volume 17 formant un logement pour un amortisseur 18 du panneau 12 et un amortisseur 19 du panneau 13. De manière similaire, un autre volume (non représenté), situé du côté de l'autre extrémité longitudinale de la bouche 9, forme un logement pour l'autre amortisseur du panneau 12 et l'autre amortisseur du panneau 13.In the open position, each panel 12, 13 is substantially parallel to the plane P, at right angles to the bridge 15, in the extension of the wall 22, 23 of the frame 20 on which it is fixed. In this position, the panels 12 and 13 being disposed on either side of the mouth of the chimney, the ejected gases are channeled vertically. In particular, they do not flow laterally towards the missile being launched. This avoids an additional piece serving as a side screen ejected gas. The panels 12 and 13 have a length slightly greater than the length of the mouth 9. They extend between the second end walls 25 of the frame 20 which are the end walls furthest from the mouth 9 Thus, the panels 12 and 13 cover areas of the bridge 15 located on either side of the mouth 9. The panels 12 and 13, the pair of walls 25 and 26 and the bridge 15 thus delimit a volume 17 forming a housing for a damper 18 of the panel 12 and a damper 19 of the panel 13. Similarly, another volume (not shown), located on the side of the other longitudinal end of the mouth 9, forms a housing for the other damper of the panel 12 and the other damper of the panel 13.
Chaque amortisseur 18, 19 est un amortisseur à gomme viscoélastique se pré- sentant sous la forme d'un cylindre 181 , 191 et d'une tige 182, 192 apte à coulisser à l'intérieur du cylindre 181 , 191. Le cylindre 181 , 192 comprend des moyens connus de l'homme du métier pour assurer une fonction de rappel de la position étendue vers la position rétractée, et une fonction de dissipation de l'énergie du mouvement entre les deux positions, étendue et rétractée. Le cylindre 181 est couplé à la paroi latérale 23 du bâti 20 par une liaison pivotEach damper 18, 19 is a viscoelastic rubber damper in the form of a cylinder 181, 191 and a rod 182, 192 slidable inside the cylinder 181, 191. The cylinder 181, 192 comprises means known to those skilled in the art to provide a function of returning the extended position to the retracted position, and a function of dissipating the energy of the movement between the two positions, extended and retracted. The cylinder 181 is coupled to the side wall 23 of the frame 20 by a pivot connection
183 d'axe B'. L'extrémité du cylindre 181 , opposée à la tige 182, comporte deux ergots 186 et 187, diamétralement opposés, disposés sur la paroi extérieure du corps du cylindre 181. Des pièces de support 231 et 232 sont fixées, par exemple par soudure, à angle droit sur la paroi latérale 23 et sur le fond 24 du bâti 20, de manière à être dispo- sées de part et d'autre du corps du cylindre 181. Les ergots 186 et 187 sont reçus dans des alésages correspondants ménagés dans les deux pièces de support 231 et 232 pour former la liaison pivot 183. L'extrémité de la tige 182, opposée au cylindre 181 , est rendue solidaire du panneau 12 par une liaison pivot 184 d'axe B. Pour cela, l'extrémité de la tige 182 comporte une partie de chape insérée entre deux oreilles 126 et 127 fixées sur la paroi interne 123 du panneau 12. La tige 185 de la liaison pivot 184 est introduite à travers les alésa- ges alignés de l'oreille 126, de la chape de la tige 182 et de l'oreille 127.183 of axis B '. The end of the cylinder 181, opposite the rod 182, comprises two lugs 186 and 187, diametrically opposed, disposed on the outer wall of the body of the cylinder 181. Support parts 231 and 232 are fixed, for example by welding, to right angle on the side wall 23 and on the bottom 24 of the frame 20, so as to be disposed on either side of the body of the cylinder 181. The lugs 186 and 187 are received in corresponding bores formed in both support pieces 231 and 232 to form the pivot connection 183. The end of the rod 182, opposite the cylinder 181, is secured to the panel 12 by a pivot connection 184 of axis B. For this, the end of the rod 182 comprises a clevis portion inserted between two ears 126 and 127 The shank 185 of the pivot connection 184 is inserted through the aligned bore of the lug 126, the clevis of the shank 182 and the lug 127.
Les axes B et B' des liaisons pivots 184 et 183 sont parallèles, mais distincts, de l'axe A de la liaison charnière 24 autour de laquelle tourne le panneau 12.The axes B and B 'of the pivot links 184 and 183 are parallel, but distinct, from the axis A of the hinge connection 24 around which the panel 12 rotates.
L'amortisseur 19 du panneau 13, articulé autour des axes C et C des liaisons pivot 193 et 194, est similaire à l'amortisseur qui vient d'être décrit. Aussi, on ne le décrira pas en détail, mais on ne notera simplement que les amortisseurs 18 et 19 sont placés « tête-bêche» dans le logement 17.The damper 19 of the panel 13, articulated around the axes C and C of the pivot links 193 and 194, is similar to the damper which has just been described. Also, it will not be described in detail, but it will be noted simply that the dampers 18 and 19 are placed "head to tail" in the housing 17.
Ainsi disposés, les amortisseurs 18, 19 sont aptes à appliquer un couple de rappel sur le panneau 12, 13 auquel ils sont couplés pour le déplacer de la position ouverte à la position fermée et inversement. La figure 5 représente de manière schématique un équivalent mécanique du moyen de retenue pouvant convenir à l'invention. Sur cette figure, l'on retrouve la liaison charnière 32 entre la bâti 20 et le panneau 12. On retrouve également la liaison pivot 183 entre le châssis 20 et le moyen de retenue 18 et la liaison pivot 184 entre le moyen de retenue 18 et le panneau 12. Le moyen de retenue 18 est équivalent à l'association en parallèle d'un élément de rappel 18a et d'un élément de dissipation d'énergie 18b.Thus arranged, the dampers 18, 19 are able to apply a restoring torque on the panel 12, 13 to which they are coupled to move it from the open position to the closed position and vice versa. FIG. 5 schematically represents a mechanical equivalent of the retaining means that may be suitable for the invention. In this figure, we find the hinge connection 32 between the frame 20 and the panel 12. There is also the pivot connection 183 between the frame 20 and the retaining means 18 and the pivot connection 184 between the retaining means 18 and the panel 12. The retaining means 18 is equivalent to the parallel association of a return element 18a and a dissipation element 18b.
Dans un mode de réalisation préféré, les moyens de retenue utilisés sont constitués par un amortisseur à gomme viscoélastique 18, 19. Des amortisseurs de ce type sont connus et sont par exemple commercialisés par l'entreprise DOMANGE JARRET. Cependant, d'autres types de moyens de retenue pourraient aussi bien être utilisés dès lors qu'ils présentent les fonctions représentées schématiquement sur la figure 5. On notera que l'élément de rappel convertit une énergie cinétique ou un travail en une énergie potentielle, qu'il peut ensuite restituer. Tout dispositif mécanique pouvant avoir ces propriétés physiques peut convenir à l'invention. C'est en particulier le cas d'un res- sort qui emmagasine l'énergie sous forme d'une élongation ou d'une compression. Ainsi, en variante les moyens de retenue peuvent prendre la forme d'un vérin hydraulique, en tant qu'élément de dissipation, associé à un ressort, en tant qu'élément de rappel, fonctionnant en extension ou bien en compression en fonction du positionnement du ressort sur la tige du vérin hydraulique.In a preferred embodiment, the retaining means used are constituted by a viscoelastic rubber damper 18, 19. Shocks of this type are known and are for example marketed by the company DOMANGE JARRET. However, other types of retaining means could be used as soon as they have the functions shown schematically in FIG. 5. It will be noted that the return element converts a kinetic energy or a work into a potential energy. that he can then restore. Any mechanical device that can have these physical properties may be suitable for the invention. This is particularly the case of a spring that stores energy in the form of elongation or compression. Thus, as a variant, the retaining means may take the form of a hydraulic cylinder, as a dissipation element, associated with a spring, as a return element, operating in extension or in compression depending on the positioning of the spring on the rod of the hydraulic cylinder.
Le fonctionnement du système d'obturation en ouverture et en fermeture va maintenant être décrit en détails. L'établissement d'une surpression dans la cheminée 11 se traduit par l'application d'une force sur la paroi interne 123, respectivement 133, du panneau 12, 13. Chaque panneau étant retenu par une liaison charnière 32, 33, la force générée possède un couple par rapport à l'axe A, A' apte à faire tourner le panneau 12, 13. Sous l'effet de ce couple, le panneau 12, 13, initialement dans sa position fermée de repos, s'ouvre jusqu'à une position ouverte dans laquelle il est sensiblement à angle droit par rapport au pont 15 du navire (cf. figure 3). Cette ouverture est extrêmement rapide et se fait en moins d'une seconde.The operation of the shutter system in opening and closing will now be described in detail. The establishment of an overpressure in the chimney 11 results in the application of a force on the inner wall 123, respectively 133, of the panel 12, 13. Each panel being retained by a hinge connection 32, 33, the force generated has a torque relative to the axis A, A 'adapted to rotate the panel 12, 13. Under the effect of this pair, the panel 12, 13, initially in its closed rest position, opens up to an open position in which it is substantially at right angles to the deck 15 of the ship (see Figure 3). This opening is extremely fast and is done in less than a second.
Dans une application numérique à titre d'exemple, le panneau 12, respectivement le panneau 13 a une longueur de 2200 mm et une largeur de 170 mm conduisant à une surface de 0,4 m2. Le panneau 12, 13 a une épaisseur e par exemple de 30 mm. Etant réalisé en acier, la masse du panneau 12, 13 est ainsi de l'ordre de 80 kg. Lorsqu'elle est causée par les gaz de propulsion d'un missile volontairement mis à feu, la surpression, typiquement 2,9 bars, génère une ouverture s'effectuant dans un temps d'ouverture de 0,04 s.In a digital application by way of example, the panel 12, respectively the panel 13 has a length of 2200 mm and a width of 170 mm leading to a surface of 0.4 m 2 . The panel 12, 13 has a thickness e for example of 30 mm. Being made of steel, the mass of the panel 12, 13 is thus of the order of 80 kg. When it is caused by the propulsion gases of a deliberately fired missile, the overpressure, typically 2.9 bar, generates an opening taking place in an opening time of 0.04 s.
Dans cette phase d'ouverture rapide, le rôle de l'amortisseur 18 est de freiner le panneau 12 lorsqu'il s'approche de sa position à 90° de manière à empêcher les rebonds et à éviter les oscillations autour de cette position finale. L'élément de dissipation 18b de l'amortisseur 18 agit en dissipant une fraction du travail mécanique de rotation du panneau 12 produit par la surpression. L'autre fraction du travail mécanique est absorbée par l'élément de rappel 18a de l'amortisseur 18. Lorsque que la surpression qui a engendrée l'ouverture des panneaux 12 et 13 chute vers la valeur nulle et repasse en dessous d'une valeur seuil, les amortisseurs 18, 19 engendrent le mouvement de fermeture. En effet, l'énergie potentielle accumulée dans l'élément de rappel 18a est restituée sous la forme un couple de rappel permettant de rabattre le panneau 12, 13 vers la position de fermeture. Afin que ce mouvement de fermeture ne soit pas trop rapide, pour permettre notamment la bonne ventilation du conduit d'évacuation 10 et de sa cheminée 11 , la majeure partie de l'énergie potentielle libérée par l'amortissement 18 est dissipée par la partie de dissipation 18b. Les constantes caractéristiques des éléments équivalents de rappel et de dissipation sont déterminées pour obtenir une fermeture lente typiquement de l'ordre de la minute et de 2 minutes dans l'application numérique retenue. Elles sont également déterminées pour définir une valeur seuil de la surpression à l'ouverture et pour une valeur seuil de la surpression à la fermeture.In this rapid opening phase, the role of the damper 18 is to brake the panel 12 when it approaches its position at 90 ° so as to prevent rebounds and to avoid oscillations around this final position. The dissipation element 18b of the damper 18 acts by dissipating a fraction of the mechanical work of rotation of the panel 12 produced by the overpressure. The other fraction of the mechanical work is absorbed by the return element 18a of the damper 18. When the overpressure which caused the opening of the panels 12 and 13 drops to the zero value and returns below a value threshold, the dampers 18, 19 generate the closing movement. Indeed, the potential energy accumulated in the return element 18a is restored in the form of a return torque for folding the panel 12, 13 to the closed position. So that this closing movement is not too fast, to allow in particular the good ventilation of the exhaust duct 10 and its chimney 11, most of the potential energy released by the damping 18 is dissipated by the part of dissipation 18b. The characteristic constants of the equivalent recall and dissipation elements are determined to obtain a slow closure typically of the order of one minute and 2 minutes in the digital application selected. They are also determined to define a threshold value of the overpressure at the opening and for a threshold value of the overpressure at closing.
En variante, les moyens d'amortissement peuvent être situés à l'extérieur du volume 17. Dans cette variante de réalisation, les moyens de rappel sont alors couplés avec la face externe 124, respectivement 134 du panneau 12, 13. Mais ils sont alors exposés aux agressions extérieures. Une autre variante consisterait à coupler non pas la tige 182 des moyens de rappel 18 au panneau 12, mais la partie de cylindre 181.Alternatively, the damping means may be located outside the volume 17. In this embodiment, the return means are then coupled with the outer face 124, respectively 134 of the panel 12, 13. But they are then exposed to external aggression. Another variant would be to couple not the rod 182 of the return means 18 to the panel 12, but the cylinder portion 181.
Bien évidemment, l'invention ne se limite pas un système d'obturation pour un lanceur disposé verticalement, muni d'une cheminée centrale. En effet, l'orientation relative du lanceur, ainsi que l'orientation et la disposition de la cheminée par rapport aux conteneurs, peuvent être modifiées sans sortir du cadre de l'invention.Of course, the invention is not limited to a closure system for a launcher arranged vertically, provided with a central chimney. Indeed, the relative orientation of the launcher, as well as the orientation and the disposition of the chimney with respect to the containers, can be modified without departing from the scope of the invention.
Ainsi le nombre de pièces constitutives du système d'obturation selon l'invention est réduit. Les moyens mis en œuvre sont tous passifs de sorte que le système d'obturation de l'invention ne nécessite pas de source d'énergie pour fonctionner. Tout ceci lui confère une grande robustesse et une sécurité de fonctionnement accrue. Mais surtout, le système d'obturation décrit fonctionne automatiquement non seulement en mode de déclenchement voulu, c'est-à-dire lorsque les gaz proviennent de la mise à feu contrôlée d'un missile, mais également lors d'une émission intempestive de gaz. Thus the number of constituent parts of the closure system according to the invention is reduced. The means used are all passive so that the shutter system of the invention does not require a power source to operate. All this gives it great strength and increased operational safety. Above all, the shutter system described operates automatically not only in the desired trigger mode, that is to say when the gases come from the controlled firing of a missile, but also during an untimely emission of gas.

Claims

REVENDICATIONS
1 .- Système d'obturation (14) d'une cheminée d'un lanceur de missiles, le lanceur (1 ) comportant au moins un conteneur (2, 3), apte à recevoir au moins un missile (4, 5), et une conduite (10) d'évacuation des gaz de propulsion comportant une chemi- née (1 1 ) d'extraction des gaz, le conteneur étant en communication avec la conduite lors du tir du missile et la conduite étant en communication avec l'atmosphère (12) via la cheminée équipée dudit système d'obturation, caractérisé en ce que le système d'obturation comporte au moins un panneau (12, 13) et un moyen de retenue du panneau (18, 19), mobile entre une position de fermeture et une position d'ouverture, le moyen de retenue comportant un moyen de rappel (18a) de la position d'ouverture vers la position de fermeture et un moyen de dissipation d'énergie (18b) résultant du mouvement d'ouverture et du mouvement de fermeture, le système d'obturation étant adapté pour que :1 .- Shutter system (14) of a chimney of a missile launcher, the launcher (1) comprising at least one container (2, 3), adapted to receive at least one missile (4, 5), and a propulsion gas evacuation pipe (10) comprising a gas extraction pipe (1 1), the container being in communication with the pipe during firing of the missile and the pipe being in communication with the pipe atmosphere (12) via the chimney equipped with said closure system, characterized in that the closure system comprises at least one panel (12, 13) and a panel retaining means (18, 19) movable between a position closure and an open position, the retaining means having biasing means (18a) from the open position to the closed position and energy dissipating means (18b) resulting from the opening movement and closing movement, the shutter system being adapted so that:
- lors du lancement d'un missile ou de l'émission intempestive de gaz, le pan- neau (12, 13) se déplace vers la position d'ouverture dès que la surpression des gaz est supérieure à une surpression seuil d'ouverture, et le temps d'ouverture du panneau mobile est rapide, inférieur à 1 seconde ; et/ou,when launching a missile or the inadvertent emission of gas, the panel (12, 13) moves towards the open position as soon as the overpressure of the gases is greater than an overpressure opening threshold, and the opening time of the mobile panel is fast, less than 1 second; and or,
- lors du rééquilibrage des pressions dans la cheminée (1 1 ) et l'atmosphère, le panneau (12, 13) se déplace vers la position de fermeture dès que la surpression des gaz est inférieure à une surpression seuil de fermeture, et en ce que le temps de fermeture du panneau mobile est lent, supérieur à 5 secondes, de préférence supérieur à 30 secondes.during rebalancing of the pressures in the chimney (1 1) and the atmosphere, the panel (12, 13) moves towards the closed position as soon as the overpressure of the gases is lower than a closing threshold overpressure, and in that that the closure time of the movable panel is slow, greater than 5 seconds, preferably greater than 30 seconds.
2.- Système d'obturation (14) selon la revendication 1 , caractérisé en ce que ledit moyen de retenue (18, 19) est équivalent mécaniquement à l'association en parallèle d'un élément de rappel (18a) et d'un élément de dissipation d'énergie (18b).2. A closure system (14) according to claim 1, characterized in that said retaining means (18, 19) is mechanically equivalent to the parallel association of a return member (18a) and a energy dissipation element (18b).
3.- Système d'obturation (14) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte au moins un panneau (12, 13) couplé par une liaison du type charnière (32, 33) avec un bâti (20) au voisinage d'une extrémité (9) de la cheminée (11 ), et au moins un moyen de retenue (18, 19) dont une première extrémi- té est couplée par une première liaison pivot (183 ; 193) au bâti et une seconde extrémité est couplée par une seconde liaison pivot (184 ; 194) au panneau, les axes (B, B' ; C, C) des première et deuxième liaisons pivot étant parallèles et distincts de l'axe (A ; A') de la liaison de type charnière. 3.- shutter system (14) according to any one of the preceding claims, characterized in that it comprises at least one panel (12, 13) coupled by a hinge type connection (32, 33) with a frame (20) in the vicinity of one end (9) of the chimney (11), and at least one retaining means (18, 19), a first end of which is coupled by a first pivot connection (183; 193) to frame and a second end is coupled by a second pivot connection (184; 194) to the panel, the axes (B, B '; C, C) of the first and second pivot links being parallel and distinct from the axis (A; ') of the hinge type connection.
4.- Système d'obturation (14) selon la revendication 3, caractérisé en ce que ledit bâti (20) est muni de butées (28a, 28b ; 29a, 29b) déterminant la position de fermeture dudit au moins un panneau (12, 13).4.-shutter system (14) according to claim 3, characterized in that said frame (20) is provided with stops (28a, 28b; 29a, 29b) determining the closing position of said at least one panel (12, 13).
5.- Système d'obturation (14) selon l'une quelconque des revendications précé- dentés, caractérisé en ce que ledit moyen de retenue (18, 19) est logé à l'intérieur d'un volume (17) délimité par le bâti (20) et ledit au moins un panneau (12, 13) en position fermée.5. A closure system (14) according to any one of the preceding claims, characterized in that said retaining means (18, 19) is housed inside a volume (17) delimited by the frame (20) and said at least one panel (12, 13) in the closed position.
6.- Système d'obturation (14) selon l'une des revendications précédentes, caractérisé en ce que ledit moyen de retenue comporte au moins un amortisseur viscoélasti- que (18, 19)6. A closure system (14) according to one of the preceding claims, characterized in that said retaining means comprises at least one viscoelastic damper (18, 19)
7.- Système selon la revendication 6, caractérisé en ce que ledit amortisseur comporte une gomme viscoélastique.7. System according to claim 6, characterized in that said damper comprises a viscoelastic gum.
8.- Système d'obturation (14) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte deux panneaux (12, 13) rectangulaires, chaque panneau étant couplé à une paire de moyens de retenue, les axes (A, A') de chacune des deux liaisons de type charnière étant de part et d'autre de la cheminée (11 ). 8. Shutter system (14) according to any one of the preceding claims, characterized in that it comprises two rectangular panels (12, 13), each panel being coupled to a pair of retaining means, the axes ( A, A ') of each of the two hinge type connections being on either side of the chimney (11).
EP09745983A 2008-04-30 2009-04-23 Shutter system for closing off the gas exhaust pipe of a missile launcher Withdrawn EP2271884A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0852957A FR2930817B1 (en) 2008-04-30 2008-04-30 SYSTEM FOR CLOSING A GAS EXHAUST DUCT FROM A MISSILES LAUNCHER
PCT/FR2009/050751 WO2009138664A2 (en) 2008-04-30 2009-04-23 Shutter system for closing off the gas exhaust pipe of a missile launcher

Publications (1)

Publication Number Publication Date
EP2271884A2 true EP2271884A2 (en) 2011-01-12

Family

ID=40344579

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09745983A Withdrawn EP2271884A2 (en) 2008-04-30 2009-04-23 Shutter system for closing off the gas exhaust pipe of a missile launcher

Country Status (4)

Country Link
EP (1) EP2271884A2 (en)
BR (1) BRPI0907662B8 (en)
FR (1) FR2930817B1 (en)
WO (1) WO2009138664A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104006707B (en) * 2014-05-16 2016-08-17 北京航天发射技术研究所 Flat pad large-scale Double Tops lid mechanism monolateral high-speed switch control system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2445423A (en) * 1946-03-06 1948-07-20 United Shoe Machinery Corp Safety container for rockets
FR1272380A (en) * 1960-10-28 1961-09-22 Mineur Becourt Automatic pivot door control installation
US3648326A (en) * 1969-11-21 1972-03-14 Rixson Inc Electromechanical door holder-closer
FR2163931A5 (en) * 1971-12-07 1973-07-27 France Etat
FR2668254B1 (en) * 1990-10-18 1993-07-23 France Etat Armement DEVICE FOR CLOSING AND PROTECTING A GAS EXHAUST SYSTEM OF A VERTICAL LAUNCHING MODULE.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009138664A2 *

Also Published As

Publication number Publication date
BRPI0907662B8 (en) 2020-04-22
FR2930817A1 (en) 2009-11-06
WO2009138664A3 (en) 2010-01-07
FR2930817B1 (en) 2011-07-01
WO2009138664A2 (en) 2009-11-19
BRPI0907662B1 (en) 2019-11-05
BRPI0907662A2 (en) 2015-07-21

Similar Documents

Publication Publication Date Title
WO1998014699A1 (en) Method and devices for closing the doors of a thrust reverser
WO2012120232A1 (en) Method and device for the successive launching of two satellites
EP1367251B1 (en) Closure system for an orifice of an air-intake duct of a combustion chamber of a ramjet, as well as ramjet and missile comprising said system
EP2271884A2 (en) Shutter system for closing off the gas exhaust pipe of a missile launcher
EP0839999B1 (en) Device for removing the plug from the air intake ducts opening into the combustion chamber of a ram jet engine
EP1184559A1 (en) Closure device for the entry of a duct, in particular for an air inlet duct to a ramjet combustion chamber
EP2530425B1 (en) Underwater vehicle comprising means for launching an underwater vehicle
EP1225326B1 (en) Conduit obturation system, in particular for ramjet air conduits
FR2901241A1 (en) Door jettisoning device for military aircraft, has guiding unit with roller sliding in ramp to maintain upper element in axis of lower element during actuation of door, where upper element is disengaged from guiding unit above angle
EP2530424A1 (en) Underwater vehicle comprising a means for launching a self-starting underwater vehicle
FR2920139A1 (en) SHOCK ABSORBER TURBO BOREHOUSE FOR HALF SHELL
FR3005155A1 (en) TURRET WITH SOCKET EVACUATION DEVICE
EP0108013A1 (en) Device and projectile for precipitating avalanches
EP3253607B1 (en) Anti-overpressure fuel tank
FR2620808A1 (en) REAR OPERATOR FOR MISSILE CONTAINER
EP3891375B1 (en) Solid booster for a launcher
EP3868649B1 (en) Aircraft including a floor and a fireproof and/or smoke-tight hatch
EP0481851B1 (en) Closing and protecting device for a gas exhaust of a vertical launching unit
EP3542121B1 (en) Projectile firing system
EP3431916B1 (en) Military vehicle
EP2792593B1 (en) Improved assembly of a telescopic mast and a device for supporting equipment, for an underwater vehicle
EP4105591A1 (en) Stationing device for a projectile
WO2021229158A1 (en) Device for detecting the absence of a mechanical barrier for a missile and missile comprising such a device
FR2620807A1 (en) LOCKING SYSTEM FOR VERTICAL LAUNCH MODULE DOORS OF MISSILES
EP0589735A1 (en) Delayed opening system of a vessel

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20101029

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20150209

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20150820