• 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:
    A device for attaching cords (5) for detecting overheating, in particular on a hot gas duct taken from the engine of an aircraft, comprises a support (20) in grooves (21) of which silicone coils (15) surrounding the cord (5) at this point are depressed. Overhanging portions (24, 25) of the groove edges and flanges projecting at the bottom of the grooves then hold the coils against accidental extraction efforts.
    公开号:FR3016948A1
    申请号:FR1450623
    申请日:2014-01-24
    公开日:2015-07-31
    发明作者:Maxime Langlade；Guillaume Sabathe；Patrick Poveda
    申请人:Airbus Operations SAS；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a device for attaching detection cords, in particular for a detection system. The invention relates to a device for attaching detection cords, in particular for a detection system. leaks and overheating in an aircraft. Such systems, often abbreviated as overheating detection systems (OHDS), are used to detect and localize local temperature increases (overheating) due to accidental leakage along gas ducts through which hot gases are drawn from the engine's engines. aircraft flow to other parts of it. The sensing cords are mounted on fasteners present along the gas conduits. In a known design, the attachment devices comprise supports thermal detection cords (for example eutectic cords), provided with grooves in which the cords, surrounded by a coil of insulating material (such as silicone), are placed, and clasps (clamps, clamps or fastening clips) that are then closed on the supports and screwed so as to tighten the cords and keep them in the grooves. The silicone coils, flexible, absorb the deformations of the clamping and insulate the thermal detection cords of the metal elements of the fastening device. FIG. 1 represents an existing example of an overheating detection system, where a flow of pressurized hot gas is taken from the reactors 1 by ducts 2, extending along the wings and the fuselage, and transported to actuators 3. Valves 4, installed on the ducts 2, regulate the flow rates of gas flowing through the ducts 2. These valves also allow to isolate certain portions of the ducts 2 in case of gas leakage. The system for detecting overheating comprises cords 5, distributed in loops, which extend along the ducts 2. An electrical signal flows through the cords 5. The cords 5 are eutectic cords composed of a core (water + salt mixture ) designed to melt when they are affected by the hot gas leaking out of the ducts 2. The modification of the structure of the core of the cord 5 modifies locally (at the location of the leak) the electric resistance of the cord and therefore the electrical signal traversing cord. This change is detected and the zone is identified. Figure 2 illustrates that the cords 5 are fixed near the ducts 2 by attachment devices 6, present from place to place. The conduits 2 are in practice covered with an insulating glass wool to prevent heat loss and an outer metal cover, or a flexible insulation sleeve to the connections between conduits 2. This cover or this cuff is provided with ventilation holes 7 through which the gas leaking from the ducts 2 escapes. By arranging the cords 5 in front of the ventilation holes 7, the leaks can be detected. In a traditional design, shown in Figure 3, the fasteners 6 are mounted on metal butterfly brackets 8 installed around the ducts 2, their insulating coating 9 and their metal cover 10. The fastening devices 6 comprise each a support 11, mounted on the metal butterfly support 8 by a bolt 12 and a spacer 13 holding the support 11 at a determined distance from the metal butterfly support 8 and the duct 2. The support 11 comprises a lower cradle 14 formed so to include two grooves 16 opening on the opposite side to the duct 2. The cords 5 are arranged in the grooves 16, and the grooves 16 of the same support 11 receive two portions of cords 5. In order to achieve a tightening, these portions cords 5 are surrounded by flexible coils, and it is these coils 15 which are tight. Clings 17 are used, articulated to the sides of the cradle 14 by hinges 18 and held in place by fastening screws 19. The disadvantages of this fastening device 6 consist of a certain complexity of the support 11 and the need for it. to use the fastening screws 19 to tighten the cords 5. The clamping therefore requires a tool. With such a device, it encounters difficulties in mounting, in particular to place the coils with the required precision, or to achieve some of the supports with tools needed to tighten the clasps in tight or difficult to access areas, so that the correct closure of the fastening devices is not always obtained, and that support points can come off; and the complexity of editing makes it anyway quite slow and difficult, even when it is accomplished successfully.
    [0002] Attempts have been made to perfect such fastening devices, by replacing the known support with another, so as to necessarily obtain an accurate assembly of the cords, with greater speed and without using tools to place the cords with coils . In a general form, the invention relates to a device for attaching longitudinal sensing cords of the grooves comprising coils surrounding portions of the cords, a support containing grooves for receiving the coils, the grooves completely passing through the support between two ends and having an opening, extending from one side of the support, between the two ends, the supports comprising coil retaining means in the grooves, characterized in that the retaining means comprise projections on a wall of the grooves, and overhanging stops, located on opposite edges of the opening of the grooves and overhanging the grooves. The coils are thus inserted into the grooves, taking advantage of their flexibility, which allows them to deform to allow this insertion; they are then retained against the extraction movements, through the openings of the grooves, by the overhanging stops of the edges of the grooves, and against the translational movements, by the projections. The use of any tools is not necessary. The supports, which can be monoblock, are simple and economical to manufacture, and they can be very light. They can thus be constructed of any suitable material by molding, and weigh only a few grams. Overhanging portions may include pairs disposed opposite each other on the opposite edges of the opening of the groove; or trios, a first stop being located on one of the edges and two others abutments being located on another of the edges on either side of the first stops.
    [0003] The projections may consist of flanges extending on a bottom face of the grooves and opposite sides of the grooves located at the end sections of the grooves to form stops for the coils, or distributed along the grooves to compress the coils and to oppose their translation movements by friction. Among the supports, some may be simple supports containing a single coil of the same cord or several cords in parallel, or, on the contrary, coils of the same cord, intermediate lengths of the cord, devoid of several coils, being then also contained in the groove. These latter supports may include bent supports, imposing a curvature of the bead to a precise shape, and a position also well defined for the bend. Another aspect of the invention is a duct for withdrawing hot gases from an engine of an aircraft comprising a wall pierced with at least one vent, characterized in that it comprises, on the wall, a plurality of devices according to the above, each support being attached to the conduit, on the wall and in front of a vent and the cords being intended to detect overheating due to leakage of said hot gases. The invention will now be described in its various aspects, features and advantages, by means of the following figures, which illustrate certain embodiments thereof: FIG. 1 illustrates an OHDS system; - Figure 2, a fragment of this system; - Figure 3, a known fastening device; Figures 4, 5 and 6, a first embodiment of the invention; - Figures 7 and 8, a second embodiment of the invention; - Figures 9 and 10, a third embodiment of the invention; - Figure 11, a fourth embodiment of the invention; and FIG. 12, a fifth embodiment of the invention. The following Figures 4, 5 and 6 illustrate a first embodiment of the invention. The support 11 of the embodiment of the prior art is replaced by a support 20, monobloc and comprising two grooves 21, opening on the opposite side to the conduit 2 and whose section is generally U-shaped, with parallel flanks connecting to a bottom face by a curvature complementary to that of the coils 15. The edges 22 and 23 of the grooves 21 are provided in some places with an overhanging stopper 24 and 25. In the illustrated example, an overhanging stop is present on each of the edges 22 and 23 of each groove 21 and is located in the center of these edges 22 and 23. It is sufficient to exercise a moderate effort during assembly, by exerting pressure on the coils 15, to insert them into the grooves 21, through the overhanging abutments 24 and 25. As can be seen in FIG. 5, the overhanging abutments 24 and 25 cover part of the coils 15 when they have been installed in the grooves 21, and thus prevent their extract ion when the fastening device according to the invention is in use. The grooves 21 also comprise flanges 26, of which there are two, for example, protruding in an arc of a circle on the bottom of the grooves 21, for locally compressing the coils 15 and preventing their translation along the grooves 21. The flanges 26 and the stops Overhanging 24 and 25 thus keep the reels 15 in place against all their possible movements, unless they exert a voluntary effort to extract them from the grooves 21. The flanges 26 can be placed under the ends of the overhanging abutments 24 and 25, as has shown, in order to tighten the coils 15. Figure 6 shows the mounting of the support 20 on the metal butterfly support 8, by means of a bolt 27. A spacer similar to the spacer 13, but not shown here may also be provided between the support 20 and the metal butterfly support 8.
    [0004] A second embodiment is described by means of FIGS. 7 and 8, where the support bears the reference 32. It differs from the first embodiment in that the overhanging abutments 24 of one of the edges 22 of each of the grooves 21 are replaced. each by a pair of overhanging portions 30 and 31 on this edge 22. The overhanging stops 30 and 31 are positioned on either side of the overhanging abutment 25, which remains on the other edge 23 of each of the grooves 21. this embodiment, the flanges 26 may, in a general manner, advantageously be arranged under the overhanging abutments 24, 25, 30 or 31 or at their ends. The overhanging abutments 24, 25, 30 or 31 shown here are in the shape of lips with a curved contour, wider in the center than at the ends.
    [0005] A variant of these two embodiments is illustrated in FIGS. 9 and 10. The support 11 of the first embodiment described here bears the reference 28 and is different from the previous one in that the flanges 26 are replaced by projections, in an arc at the two ends of the grooves 21: these are abutments 29, which block the movement of the coils 15, the length therefore corresponds to the distance between the stops 29 on each of the grooves 21: such an arrangement allows to place the coils 15 with greater precision and also hold them more firmly than by the frictional forces involved in the previously described embodiment. A third embodiment is described by means of FIG. 11: the support 40 is still monobloc and has a shape of ruler comprising two grooves 41 similar to the grooves 21 previously described. Each of the grooves 41 is provided with means for retaining the coils 15, such as overhanging portions 24, 25, 30, 31, and flanges 26, situated approximately below these overhanging portions, in a sufficient number to enable them to receive several coils 15. , four in the embodiment shown. A fourth embodiment is described by means of FIG. 12. The support 33 is of bent shape and comprises two end portions 34 and 35, each of which is similar to that of one of the preceding embodiments, and an arcuate portion. 36 intermediate. These end portions 34 and 35 house a coil 15 in each of their grooves, and intermediate portions of the beads 5 extend in the arcuate portion 36 from one coil 15 to the next. The arcuate portion 36 includes grooves 37, which extend the grooves of the end portions 34 and 35 to accommodate these intermediate portions. In order to avoid increasing the weight of this more bulky support 36, it is advantageous for the grooves 37 to be recessed at their bottom, since they have no function of supporting the cords 5. The arcuate portion can also be recessed in the center 38, between the grooves 37. A similar provision could be adapted for the embodiment of Figure 11. One of the end portions 34 carries a central bore 39 to receive the fixing bolt, such as 27. With this arrangement , elbows of shapes and very precise positions can be imposed on the cords 5, the positions of the flexible coils 15, on either side of this bend, being perfectly defined. Although point fastening devices such as those of the first two embodiments may be preferred because of their greater lightness and ease of use, fastening devices involving guiding longer portions of the cords may be preferred. also be considered since the metal butterfly brackets 8 necessary for their maintenance on the ducts 2 would be fewer. In the third and fourth embodiments, it is advantageous for the bottom of the grooves 41, if not hollowed out as shown in FIG. 12, to be perforated with ventilation holes 42 (represented only in part ) to allow gases leaking ducts 2 to reach the portions of the cords 5 not covered with a coil 15 and thus be able to detect leaks.
    权利要求:
    Claims (10)
    [0001]
    CLAIMS1) Detection cord attachment device, comprising coils (15) surrounding portions of the strings (5), a support (20, 28, 32, 36, 40) containing grooves (21, 41) for receiving coils (15), the grooves completely passing through the support between two ends and having an opening, extending on one side of the support, between the two ends, the support comprising means for retaining the coils in the grooves, characterized in that the retaining means comprise projections (26, 29) on a wall of the grooves (21, 41) and overhanging stops on opposite edges (22, 23) of the opening of the grooves (21.41). ) and overhanging the grooves.
    [0002]
    2) Detection cord attaching device according to claim 1, characterized in that each groove comprises at least one pair of said overhanging abutments (24, 25) arranged face to face on the opposite edges of the opening of the groove.
    [0003]
    3) Device for attaching detection leads according to claim 1, characterized in that each groove (21, 41) comprises at least one trio of overhanging stops (25, 30, 31), a first stop (25) being located on one of the edges and two others abutments (30, 31) being located, on an opposite edge, on either side of the first stops.
    [0004]
    4) Device for attaching detection leads according to any one of claims 1 to 3, characterized in that the overhanging stops (24, 25, 30, 31) are curved contoured lips.
    [0005]
    5) Device for attaching detection leads according to any one of claims 1 to 4, characterized in that the projections (26) consist of flanges extending on a bottom face of the grooves and on opposite sides of the grooves.
    [0006]
    6) Device for attaching detection leads according to any one of claims 1 to 4, characterized in that the projections (29) consist of stops located at the ends of the grooves.
    [0007]
    7) Detection cord attachment device according to any one of claims 1 to 6, characterized in that the coil retaining means are designed for a plurality of coils along the same bead.
    [0008]
    8) Device for attaching detection cords according to any one of the preceding claims, characterized in that the support (36, 40) is now under the grooves.
    [0009]
    9) Device for attaching detection leads according to any one of claims 7 or 8, characterized in that the support (36) and the grooves are bent. 10
    [0010]
    10) Hot gas withdrawal duct of a motor of an aircraft comprising a wall pierced with at least one vent, characterized in that it comprises, on the wall, a plurality of devices in accordance with any one of preceding claims, each support being attached to the duct, on the wall and in front of a vent, and the cords being intended to detect overheating due to leakage of said hot gases.
    类似技术:
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    FR3016948B1|2016-12-09|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4840334A|1987-02-17|1989-06-20|Nifco, Inc.|Fastener for fastening elongate object|
    EP0717483A1|1994-12-13|1996-06-19|Osram Sylvania Inc.|Angled cable clamp|
    EP1491806A1|2003-06-27|2004-12-29|Snecma Moteurs|Device for fixing and holding electrical harness on a jet engine|
    US20120097443A1|2010-10-21|2012-04-26|Snecma| device for spacing electrical harnesses in a turbomachine|
    US8613411B1|2011-09-14|2013-12-24|C & B Manufacturing|Retainer device|FR3045771A1|2015-12-17|2017-06-23|Airbus Operations |ATTACHMENT BRACKET OF AT LEAST ONE CORD|US1896285A|1930-03-25|1933-02-07|American Cable Co Inc|Tubular casing|
    US3711633A|1971-12-02|1973-01-16|Gen Motors Corp|Fitting means for axially slit corrugated conduits|
    US3867005A|1972-09-14|1975-02-18|Bunker Ramo|Insulation-piercing contact member and electrical connector|
    SE432036B|1977-04-18|1984-03-12|Bunker Ramo|INSULATING TRANSFER CONTACT|
    US4524999A|1978-02-06|1985-06-25|Indian Head Inc.|Flexible conduit system|
    GB2027479B|1978-05-30|1982-03-24|Ford Motor Co|Holders for cables and conduits|
    US4234999A|1978-09-18|1980-11-25|Systron-Donner Corp.|Clamp assembly and fabrication thereof|
    DE3802698C3|1988-01-29|1996-09-26|United Carr Gmbh Trw|Cable holder made of plastic|
    US5002244A|1988-11-16|1991-03-26|Huron Products Corporation|Fuel system organizer for automotive vehicles|
    US5918636A|1996-04-10|1999-07-06|Mitchell; Herbert|Fuel economiser|
    US5794897A|1996-04-22|1998-08-18|Andrew Corporation|Transmission line hanger, a method of attaching the hanger and the resulting assembly|
    US5992802A|1997-05-14|1999-11-30|Campbell Design Systems|Cable support|
    US6038852A|1997-12-05|2000-03-21|United Technologies Corporation|Wear resistant augmentor fuel manifold clamp|
    US6093892A|1998-08-03|2000-07-25|Hi-Lex Corporation|Conduit end fitting with automatic length adjustment|
    US6325336B1|1999-10-18|2001-12-04|Clark Equipment Company|Hydraulic tubing clamp|
    CN2485847Y|2001-04-14|2002-04-10|常州市瞬通通讯器材有限公司|Wire duct connector|
    US7007900B2|2002-10-01|2006-03-07|Andrew Corporation|Cable hanger|
    CN2657337Y|2003-09-25|2004-11-17|华为技术有限公司|Wire clip|
    FR2863587B1|2003-12-11|2006-02-24|Hurel Hispano|DEVICE FOR RETAINING A FIRE DETECTION SYSTEM|
    CN2751318Y|2004-08-06|2006-01-11|黄文泽|Buckle structure of major-minor glasses frame|
    US7591666B2|2006-11-10|2009-09-22|Zierick Manufacturing Corporation|Surface mount crimp terminal and method of crimping an insulated conductor therein|
    US8678325B2|2011-02-10|2014-03-25|Honda Motor Co., Ltd.|Pipe bracket for vehicle|
    CN103474789A|2013-09-10|2013-12-25|昆山市巴城镇顺拓工程机械配件厂|Clamp used for fixing cable|US10101238B2|2016-05-16|2018-10-16|General Electric Company|Integrated ventilation and leak detection system and method of assembly|
    EP3800370A1|2016-05-25|2021-04-07|Preformed Line Products Co.|Support structure for supporting a cable|
    US10931090B2|2017-03-07|2021-02-23|Kidde Technologies, Inc.|Mount with clip|
    US10663089B2|2017-11-03|2020-05-26|Panduit Corp.|Universal cable tie mount|
    US20210172804A1|2019-12-09|2021-06-10|Kidde Technologies, Inc.|Wire mesh grommet for fire and overheat detection system|
    US20210285378A1|2020-03-16|2021-09-16|Kidde Technologies, Inc.|Rail and tube assembly|
    法律状态:
    2016-01-21| PLFP| Fee payment|Year of fee payment: 3 |
    2017-01-20| PLFP| Fee payment|Year of fee payment: 4 |
    2018-01-19| PLFP| Fee payment|Year of fee payment: 5 |
    2020-01-21| PLFP| Fee payment|Year of fee payment: 7 |
    2021-01-21| PLFP| Fee payment|Year of fee payment: 8 |
    2022-01-19| PLFP| Fee payment|Year of fee payment: 9 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1450623A|FR3016948B1|2014-01-24|2014-01-24|DEVICE FOR ATTACHING DETECTION CORDS, IN PARTICULAR FOR A SYSTEM FOR DETECTING LEAKS AND OVERHEATING ON A GAS LINE IN AN AIRCRAFT|FR1450623A| FR3016948B1|2014-01-24|2014-01-24|DEVICE FOR ATTACHING DETECTION CORDS, IN PARTICULAR FOR A SYSTEM FOR DETECTING LEAKS AND OVERHEATING ON A GAS LINE IN AN AIRCRAFT|
    US14/602,981| US9463867B2|2014-01-24|2015-01-22|Detection-cord attachment device, in particular for an overheating and leak detection system on a gas pipe in an aircraft|
    CN201510032929.7A| CN104803003A|2014-01-24|2015-01-22|Detection-cord attachment device, in particular for an overheating and leak detection system on a gas pipe in an aircraft|
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