• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a duct for forming air circulation ducts in a structure which comprises a flexible tube (10) of composite material, said tube having along its length sections (11) for which the wall of the tube ( 10) is stiffened by means of structural elements (13) made of a rigid composite material integrated in the wall of the tube (10). The structural members are configured and arranged on the surface of the tube to form a lattice framework surrounding the tube wall. In a particularly advantageous embodiment, the conduit further comprises electrical conductors (21, 22), arranged longitudinally on the wall of the conduit, said electrical conductors having a rectilinear path (21) at the stiffened sections (11) of the conduit and a path having sinuosities (22) at some of the sections of the non-rigidified conduit (12), sinuosities that allow the driver to tolerate any torsion inflicted to the conduit during its introduction into the structure.
    公开号:FR3028914A1
    申请号:FR1461288
    申请日:2014-11-21
    公开日:2016-05-27
    发明作者:Benoit Dantin
    申请人:Airbus Group SAS；
    IPC主号:
    专利说明:

    [0001] The invention relates to the general field of air conditioning in aircraft and relates more particularly to the placement on the structure of the aircraft of the pipes intended for the circulation of the aircraft. 'air. The invention also relates to the problems of placing on the structure of an aircraft the different strands constituting the electrical wiring. With regard to the aircraft currently in service or being assembled, the introduction of the air-conditioning ducts passing through the aircraft as well as the placement of the strands which ensure the electrical interconnections between the different equipment. in the aircraft is a delicate step in assembling an aircraft. The circulation of air in aircraft is generally performed by rigid pipes made of fiberglass and phenolic resin composite, connected together by connecting sleeves. For obvious reasons of weight, these pipes are of very light, fragile structure, which makes their installation particularly delicate and expensive in installation time. Moreover, their intrinsic fragility makes them vulnerable and causes frequent replacements, especially during assembly and maintenance operations of the aircraft. These pipes are also attached to the structure by means of supports fixed on structural elements (primary structure, cladding, etc.), the setting up of the supports (surface preparation, gluing / riveting of the supports, cycle of drying ....) being itself time consuming. The electrical interconnection between equipments is, for its part, currently carried out by means of electric cables. These cables make it possible, for example, to transmit currents of high intensity, functional currents of lower intensity, or electrical communication signals, as well as the grounding of the various equipments. 3028914 2 These cables are also attached to the structure via supports fixed to structural elements (primary structure, cladding ...). The establishment of the interconnection is also generally carried out using pre-made cable strands, of determined dimensions, 5 difficult to reconfigurable. As in the case of air ducts, the placement of the supports (surface preparation, bonding / riveting of the supports, drying cycle, etc.) of the electrical interconnection is itself time consuming. Further, the spacing of the carriers means that the electrical links forming the interconnect provide laxity to the wiring, so that a segregation distance between two neighboring links is imposed by the system installation rules so that that two adjacent electrical connections can not come into contact with each other because of the laxity of these links between two fasteners. 15 Consequently, the obligation to respect segregation distances between different drivers makes the establishment of an interconnection in accordance with the rules in force in this case, requires a large volume of deployment, hardly compatible with the architectures of the aircraft today, which are carrying more and more systems into ever smaller technical spaces. Thus the need to shorten the installation time of the various equipment during the assembly of an aircraft and to make the establishment of the means of electrical connection and air transport compatible constraints of mass and congestion gives rise to the need to rethink in depth the structure of these means. An object of the invention is to provide a simple and effective solution to the problem described above. For this purpose the invention relates to a duct for forming air circulation ducts in a structure. The conduit according to the invention comprises a flexible tube of composite material whose matrix is a resin which remains flexible after polymerization. Said tube has sections along its length for which the wall of the tube is stiffened by means of structural elements made of a composite material whose matrix is a resin which stiffens after polymerization. Said structural members are configured and arranged at the surface of the tube to form a lattice framework surrounding the tube wall. According to different arrangements that can be combined with each other the device according to the invention also has various complementary features. Thus: According to a particular arrangement, the matrix forming the composite material constituting the tube is a polyurethane resin or a silicone resin. According to one particular arrangement, the matrix forming the composite material constituting the structural elements is an acrylic resin. According to one particular arrangement, the lattice framework of rigid composite material constituting the rigid sections of the duct is formed of rings connected to each other by longitudinal members arranged all around the wall of the tube. According to one particular arrangement, the duct according to the invention further comprises ring-shaped structural elements of rigid composite material arranged at the ends of the duct. According to one particular arrangement, the lattice framework and the structural elements of the ends are integrated in the wall of the flexible tube before polymerization of the resins constituting the flexible tube and the elements forming the framework. According to a particular arrangement, the reinforcing elements are integrated in the pipe before polymerization of the resins. According to a particular arrangement, the conduit according to the invention further comprises electrical conductors arranged longitudinally on the wall of the conduit, said electrical conductors having a rectilinear path at the level of the rigidified sections of the conduit and a path having sinuosities at the level of certain non-rigidified sections of the duct. According to a particular arrangement, said electrical conductors have a path having sinuosities at the non-rigidified sections of the duct situated at the ends of said duct. According to a particular arrangement, said electrical conductors are integrated in the wall of the conduit before polymerization of the resins. According to a particular arrangement, said electrical conductors are attached to the wall of the conduit by means of an adhesive. The invention advantageously makes it possible to produce long pipes, comprising rigid parts that can be quickly put in place and fixed to the structure, and flexible parts allowing easier installation and disassembly. Furthermore, the possibility of producing in one piece pipes of great lengths that can carry electrical connections advantageously makes it possible to make electrical connections of great lengths having a minimum of connection zones. These zones are likely to penalize the functional behavior of the electrical systems by adding contact resistances and decreasing the reliability of the link as a whole. The characteristics and advantages of the invention will be better appreciated thanks to the description which follows, which description is based on the appended figures which show: FIG. 1, an overall schematic view showing the structure of a duct according to FIG. invention; - Figure 2, a schematic overall view of a conduit according to the invention equipped with conductive elements; - Figure 3, a partial schematic view of the conduit according to the invention shown in Figure 3; FIG. 4 is a partial diagrammatic view of the duct according to the invention shown in FIG. 3, the end of the duct element being folded; - Figure 5, a partial schematic view of a conduit 10a according to the invention shown in Figure 3, said end being connected to another conduit 10b. The remainder of the description presents the invention through an exemplary embodiment illustrated by the associated FIGS. 1 to 5. This example, which simply aims to highlight the characteristics of the invention, is of course in no way limiting the scope or extent of the latter. As illustrated in FIG. 1, the device according to the invention mainly consists of a duct 10, an air conditioning duct intended to be housed in an aircraft structure for example, having an alternation of rigid duct sections. 11 The respective lengths of the rigid 11 and flexible 12 sections depend essentially on the use of the conduit considered and the conditions of installation of this conduit. According to the invention, this "flex-rigid" structure is obtained by producing a composite material duct formed of a reinforcement fabric impregnated with a resin having the property of remaining flexible after polymerization. In a particular embodiment taken as non-limiting example, the resin used is a polyurethane resin. The flexible duct 10 thus obtained is, moreover, stiffened on certain sections by structural elements 13, each element consisting of rings 131a and 131b made of composite material with a rigid matrix, arranged along the duct 10 and interconnected by longitudinal members. 132, made of a rigid matrix composite material as well, and arranged all around the wall of the duct 10, preferably evenly. The assembly constituted by the rings 131a and 131b connected to each other by longitudinal members 132 forms a frame 13 having the appearance of a frame or lattice surrounding certain sections of the duct 10, the central part in particular, and making these sections incapable of flexion. The duct 10 according to the invention may thus consist of a succession of rigid parts 13 and flexible parts 12 such as those illustrated in FIG. The duct 10 thus obtained is also stiffened at its ends by end elements 14, 15. in the form of rings made of rigid matrix composite material, similar to the rings 131a and 131b constituting the rigid structure 13. These rings, of determined widths, have the function of facilitating the connection of two ducts, allowing for example to easily insert a rigid coupling tube 31 at the end of each of the ducts as shown in FIG. 3. Depending on whether the end section of the duct considered is held flexible or stiffened, an end ring may be placed at the end a section of the conduit 10 maintained flexible, as shown in Figures 1 to 3, or constitute the end ring 131b of a rigid section. Optionally, the duct 10 may also comprise intermediate structures 14 and 15 in the form of rings made of rigid matrix composite material, similar to the rings 131a and 131b constituting the rigid structure 13 but without a rigid connection between them or with this last. These rigid intermediate rings 14 and 15 may in particular facilitate the connection between two ducts having flexible endings of duct sections held flexible.
    [0002] The structure duct "Flex-rigid" according to the invention can be made of composite material in various ways known and not shown here. For the manufacture of "flex-rigid" ducts, it is possible for example to use a fiberglass fabric woven in large mesh and a resin remaining flexible after polymerization (polyurethane, silicone, etc.) for the flexible parts, and a fabric of standard glass with a rigid resin after polymerization, an epoxy resin for example. However, in a preferred embodiment, the conduit 10 according to the invention is made in a single operation which consists in forming a tube from a fiberglass fabric impregnated with an elastic resin and constituting the rigid framework. on the outer wall of the tube thus formed by applying to the outer surface of the tube webs of fabrics impregnated with a rigid matrix, the impregnated fabric strips being arranged to form the rings 131a and 131b and the longitudinal members 132 forming an element of frame 13 or the end rings 14 and 15 of the duct.
    [0003] The assembly thus formed is then polymerized in a single operation, so that the resulting conduit 10 forms a monolithic object, that is to say without added element after manufacture, by gluing or any other known technique. According to this preferred embodiment, the epoxy resin used to form the framework elements 13 is chosen so that its polymerization takes place under the same conditions as those of the polyurethane used to make the conduit 10. Advantageously, as 4 and 5, this "flex-rigid" structure makes it possible to have a single duct which has rigid straight sections and flexible sections able to deform without damage, making it possible to achieve piece ducts 10 of great length (several meters) easy to set up inside the structure for which it is intended. The rigid portions 11 allow easy handling of the conduit 10 considered, the installation of said conduit on the structure and the easy connection of different ducts forming a pipe. The flexible portions 12, in turn, facilitate the assembly and disassembly of pipes 5 in congested environments and the resumption of geometric assembly variations of the structures on which they are installed. They allow in particular the conduit 10 considered to have bends to follow the desired path. The elbows are thus made without requiring the interruption of the conduit or the introduction of a rigid element bent. It is thus possible to produce, with a minimum of junctions 31, long length pipes having both rectilinear portions and bent portions. In a particular embodiment, illustrated in FIGS. 2 to 5, the duct 10 according to the invention may be equipped with electrical conductors 21 (cables, braids, etc.) arranged so as to run longitudinally along the duct 10. For this purpose, said conductors 21 may be directly bonded to the surface of the duct 10 after manufacture of the latter. Alternatively, they can be integrated, before polymerization, in the matrix impregnating the composite material so that after polymerization they form an integral part of the wall of the conduit 10. The conductors 21 are preferably arranged so as to pass on the longitudinal members 132 constituting each of the frames 13 forming the rigid sections 11 of the duct 10. According to the invention, the conductors 21 are arranged on the duct 10 so as not to hinder the deformation capacity available to the duct 10 at the level of the sections 12 held flexible . For this purpose, they adopt in these zones a corrugated course 22, as illustrated in FIGS. 2 and 3. This corrugated course advantageously makes it possible to deform the rectilinear profile of the duct 10 at the level of the flexible sections 12, as illustrated by FIGS. and 5, without the conductors 21 breaking or tearing from the surface of the duct 10 thereby damaging the wall of the latter. It is thus possible to advantageously connect two ducts 10a and 10b oriented in different directions, as illustrated in FIG. 5, by means of a simple rectilinear connection sleeve 31.
    [0004] It should be noted that because of the smaller number of junctions necessary to form a pipe of given length, the path of electrical connections along the pipe considered requires a smaller number of connection devices 51 so that the electrical losses ( by Joule effect 3028914 8 related to the electrical resistance)) caused by the connections are lower and that the risk of breakage of these electrical connections by interruption of these connections are less.
    [0005] The use of "flex-rigid" ducts according to the invention thus provides several advantages: It allows the group installation of air ducts and electrical networks, which leads to a reduction in the workload of the operators charged the installation of these equipment and the cycle time necessary for the installation of the electrical systems (removal of the installation of the supports of the electrical connections). It makes it possible to increase the compactness of the electrical connections, the conductive elements being directly integrated into the surface of the air ducts (no segregation distances to be respected); It induces a reduction of the mass of the electrical connections by the suppression of the supports necessary for its maintenance in the aircraft; - It introduces a certain tolerance to the damage of the air ducts which can now deform in case of impact, related to a tool fall for example, instead of deteriorating. The flexibility of the "flex-rigid" ducts rendering the latter more robust, their use therefore advantageously entails a reduction in maintenance costs.
    权利要求:
    Claims (11)
    [0001]
    REVENDICATIONS1. Conduit for forming air circulation ducts in a structure, characterized in that it comprises a flexible tube (10) made of composite material whose matrix is a resin which remains flexible after polymerization, said tube having sections along its length ( 11) for which the wall of the tube is stiffened by means of structural elements (13) made of a composite material whose matrix is a resin which is stiffened after polymerization, said structural elements (13) being configured and arranged on the surface of the tube to form a lattice framework surrounding the wall of the tube (10).
    [0002]
    2. Device according to claim 1, characterized in that the matrix forming the composite material constituting the tube (10) is a polyurethane resin or a silicone resin.
    [0003]
    3. Device according to one of claims 1 or 2, characterized in that the matrix forming the composite material constituting the structural elements (13) is an acrylic resin.
    [0004]
    4. Device according to any one of claims 1 to 3, characterized in that the frame (13) lattice of rigid composite material constituting the rigid sections of the duct is formed of rings connected to each other by longitudinal members arranged around the wall of the tube (10).
    [0005]
    5. Device according to any one of the preceding claims, characterized in that it further comprises structural elements in the form of rings (14, 15), of rigid composite material, arranged at the ends of the conduit.
    [0006]
    6. Device according to any one of claims 1 to 5, characterized in that the lattice framework (13) and the structural elements of the ends (14, 15) are integrated in the wall of the tube 3028914 10 (10) flexible before polymerization of the resins constituting the flexible tube and the elements forming the framework.
    [0007]
    7. Devices according to claim 6, characterized in that the reinforcing elements (13, 14, 15) are integrated in the conduit before polymerization of the resins.
    [0008]
    8. Device according to any one of the preceding claims, characterized in that it further comprises electrical conductors 10 (21, 22) arranged longitudinally on the wall of the conduit, said electrical conductors having a rectilinear course (21) at the stiffened sections (11) of the conduit and a path having sinuosities (22) at some of the non-rigidified conduit sections (12). 15
    [0009]
    9. Device according to claim 8, characterized in that said electrical conductors have a path having sinuosities (22) at the non-rigidified sections of the duct (12) at the ends of said duct. 20
    [0010]
    10.Dispositif according to any one of claims 8 or 9, characterized in that said electrical conductors (21, 22) are integrated in the wall of the conduit before polymerization resins. 25
    [0011]
    11.Dispositif according to any one of claims 8 or 9, characterized in that said electrical conductors (21, 22) are attached to the wall of the conduit by means of an adhesive.
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    US20170328497A1|2017-11-16|
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    EP3221624A1|2017-09-27|
    FR3028914B1|2017-01-06|
    CN107208829A|2017-09-26|
    引用文献:
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    法律状态:
    2015-11-19| PLFP| Fee payment|Year of fee payment: 2 |
    2016-05-27| PLSC| Search report ready|Effective date: 20160527 |
    2016-11-18| PLFP| Fee payment|Year of fee payment: 3 |
    2017-11-21| PLFP| Fee payment|Year of fee payment: 4 |
    2018-11-23| PLFP| Fee payment|Year of fee payment: 5 |
    2020-10-16| ST| Notification of lapse|Effective date: 20200910 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1461288A|FR3028914B1|2014-11-21|2014-11-21|"FLEX-RIGID" AIR PIPING|FR1461288A| FR3028914B1|2014-11-21|2014-11-21|"FLEX-RIGID" AIR PIPING|
    US15/528,185| US10203051B2|2014-11-21|2015-11-19|“Flexible-rigid” air pipe|
    EP15798038.4A| EP3221624B1|2014-11-21|2015-11-19|"flexible-rigid" air pipe|
    PCT/EP2015/077064| WO2016079226A1|2014-11-21|2015-11-19|"flexible-rigid" air pipe|
    CN201580071731.8A| CN107208829B|2014-11-21|2015-11-19|" soft-rigidity " air pipeline|
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