• 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:
    Cable gland (1) for electrical cable under threaded protective conduit, comprising a tubular body (2) enclosing a sealing ring (3), an annular nut (4) screwed onto the body to compress said sealing ring and in connection with said nut, at an end portion (41) of said nut opposite said body, a tubular connecting sleeve (5) having a threaded portion (51) for connection to the threaded conduit, said sleeve comprising a bore connecting member (52) mounted by force fitting on an outer surface (42) of said end portion of said nut, said sleeve having an annular groove (54) on an inner surface (53) of said connecting bore and said surface external of said nut having a raised surface (43) engaging said groove during force fitting, so as to retain said sleeve on said end portion of said nut allowing its free rotation about said nut.
    公开号:FR3078449A1
    申请号:FR1851720
    申请日:2018-02-27
    公开日:2019-08-30
    发明作者:Nicolas PINEAUD；Silvin LEBON
    申请人:Cooper Capri SAS；
    IPC主号:
    专利说明:

    Cable entry device for electrical cable under conduit
    The present invention relates to a cable entry device or cable gland and, more particularly, a cable gland adapted to be disposed on a wall of an enclosure to ensure sealing of the passage of an electric cable passing through said wall, said cable. electric being brought to the enclosure under a protective conduit comprising a thread for connection with said cable gland, said cable gland comprising a tubular body having a threaded end for fixing to said wall, said tubular body enclosing a ring compressible seal, an annular nut adapted to be screwed onto a threaded end of said tubular body opposite to said threaded end, to compress said sealing ring and, in connection with said annular nut, to an end portion of said annular nut opposite to said tubular body, a tubular connection sleeve comprising a part threaded adapted to cooperate by screwing with said connecting thread of said protective conduit.
    The field of application of the invention is more precisely that of cable glands conforming to international standards for electrical equipment intended for use in hazardous environments and more particularly in explosive atmospheres (in particular falling under the international certification system lECEx ). We are talking about "Ex" equipment. Such "Ex" cable glands are suitable for routing cables inside an electrical enclosure placed in an explosive atmosphere while maintaining the integrity of the enclosure protection and the safety of the electrical installation. In particular, the installation principles in this context are respected by screwing the cable gland directly on the wall of the enclosure or, for non-tapped holes, by fixing it to the wall traversed with a lock nut. The sealing ring seals, in particular with respect to flammable gases and dust.
    In certain installations, cables, armored or unarmoured, can be brought under protective conduits, for example of the flexible metallic conduit type, in particular to provide additional mechanical protection. This is an alternative to the use of shielded cables when used in a dangerous environment as mentioned above. In such installations, the protective conduit into which the cable is brought must be connected to the electrical enclosure by means of an "Ex" cable gland. In this context, certain solutions have been developed to adapt these cable glands, in order to allow the connection of the cable gland with the protective conduit.
    There is thus known a cable gland conforming to the generic definition given above, which therefore comprises, in particular, a tubular connection sleeve, in connection with the actuation nut of the seal of the cable gland, with a threaded part. suitable for ensuring connection by screwing with the connection thread of the protective conduit.
    The company “CMP Products Ltd” markets under the reference A2FFC cable glands of this type, which are intended for applications in explosive atmospheres, in which the connection sleeve, which is screwed inside the protective conduit, is fixed between the actuation nut of the sealing ring and the latter, so as to allow sliding in rotation between the connection sleeve and the nut mounted on the latter, before mounting. However, once the actuation nut of the sealing ring is tightened on the body of the cable gland for tensioning it to ensure sealing, the connection sleeve is no longer free to rotate. Also, it is mandatory to first fix the connection sleeve of the cable gland on the protective conduit, before energizing the cable gland by tightening the nut on the body. Otherwise, if an operator tries to screw the connection sleeve onto the protective conduit, the torque exerted on the connection sleeve will be transmitted to the actuation nut, which will therefore tend to loosen, to the detriment of the sealing of the cable gland.
    However, in the particular context of cable glands, which are intended to be used in potentially explosive atmospheres, improper installation of the cable gland contributes to ruining the protection against explosions.
    In this context, the present invention aims to provide a cable gland, which is capable of adapting to different possible mounting configurations of the cable gland with a cable supply protection conduit and, in particular, which is capable of '' authorize mounting when the cable gland is already energized, without compromising the sealing function of the cable gland.
    To this end, the cable gland of the invention, furthermore in accordance with the generic definition given in the preamble above, is essentially characterized in that said tubular connection sleeve comprises a connection bore mounted by an adjustment by force on an external surface of said end portion of said annular nut, said sleeve having an annular groove on an internal surface of said connection bore and said external surface of said end portion of said nut having a raised surface, arranged in so as to engage in said annular groove when said connection bore is force-fitted on said end portion, said engagement of said relief surface in said annular groove thus retaining said sleeve on said end portion of said nut and allowing free rotation of said sleeve around said end portion of said nut.
    Thus, thanks to this arrangement, the cable gland of the invention is provided with a connection sleeve, making it possible to connect the cable gland with a protective conduit for supplying the cable, which after mounting on the cable gland gland, remains free to rotate relative to the annular nut to which it is linked, regardless of the tightening of the latter on the body of the gland. In addition, the assembly obtained by such a force fit cannot in principle be disassembled without damaging the nut or the sleeve. In other words, thanks to the sleeve retaining function provided by the assembly, the sleeve is captive once mounted on the cable gland.
    Advantageously, the external surface of said end portion of said nut comprises an annular groove disposed downstream of said surface in relief relative to the direction of introduction of said sleeve, into which an O-ring adapted to come into contact with the surface is inserted. internal of said sleeve connection bore, making it possible to increase the friction during the rotation of said sleeve in order to have a controlled rotation, while ensuring sealing between the external surface of said nut and said internal surface of the connection bore of said sleeve .
    Advantageously, said end portion of said nut comprises an external centering surface, disposed downstream of said annular groove relative to the direction of introduction of said sleeve, adapted to cooperate with said internal surface of the connection bore of the sleeve coming in look, leaving a functional clearance between them, so as to ensure the centering of the sleeve on the end portion of the nut.
    Preferably, said internal surface of said connection bore and said relief surface of the external surface of said end portion of said nut are dimensioned so as to make a tight fit, for example of standard H7p6 type, between these two surfaces.
    Advantageously, said raised surface is a knurled surface. Thus, thanks to the knurling carried out on said raised surface, it is possible to reduce the requirements of the adjustment tolerances of the connection bore of the sleeve on the end portion of the nut.
    Advantageously, said connection sleeve has a rounded chamfer at its end receiving said end portion of said annular nut, said relief surface of the external surface of said end portion comprising, opposite said rounded chamfer, a complementary chamfer.
    Preferably, said tubular connection sleeve comprises a threaded bore opposite to said connection bore, intended to receive a male threaded end of said protective conduit.
    Other features and advantages of the invention will emerge on reading the description given below of a particular embodiment of the invention, given by way of indication but not limitation, with reference to the accompanying drawings in which:
    - Figure 1 is a schematic perspective view in axial section of a first embodiment of a cable gland according to the invention;
    - Figures 2 to 4 are schematic sectional views of the cable gland of Figure 1, illustrating the establishment of the connection sleeve on the cable gland;
    - Figure 5 is a detail view of the cable gland of Figure 1, illustrating the interference zone between the annular nut and the connection sleeve;
    - Figure 6 is a schematic perspective view in axial section of an alternative embodiment of a cable gland according to the invention.
    In these figures, identical reference numbers, possibly assigned a "premium", designate identical or similar parts.
    With reference to FIG. 1, the cable gland 1 firstly comprises a tubular body 2, which comprises an end 21 intended to pass through a wall on which the cable gland is to be mounted. This end 21 intended to pass through the wall has an annular abutment shoulder 22 delimiting a thread (not shown) which can cooperate, for fixing the stuffing box 1 to the wall, with a thread on the wall or even with a locking nut. on the face of the wall opposite to that on which the annular shoulder 22 abuts.
    The body 2 of the cable gland 1 also has an internal shoulder 23, on which a compressible sealing ring 3 comes to bear. This compressible sealing ring 3 is intended to be compressed against the internal shoulder 23 of the body 2 by an annular nut 4, which is screwed onto a threaded end 24 of the body 2, opposite its threaded end 21. This arrangement allows a deformation of the sealing ring 4 in the direction of the longitudinal axis XX of the cable gland 1. To do this, the sealing ring 3 can be made of elastomeric material or natural rubber.
    The part of the annular nut 4 opposite the body 2 of the cable gland 1, is terminated by an end portion 41, intended to ensure the connection with a tubular connection sleeve 5, allowing the connection of the cable gland 1 with a conduit protection (not shown), for example of flexible metal conduit type, under which an electrical cable is brought to pass through the wall by means of the cable gland 1. Such a protection conduit is conventionally provided with a threaded end for its connection to the cable gland. Also, at its end opposite to the end portion 41 of the annular nut 4 to which it is linked, the tubular connection sleeve 5 comprises an end part 51 intended to cooperate by screwing with the threaded end of a protective conduit. The latter comprises for example a male threaded end. Thus, the end part of the sleeve 5 may include a threaded bore (female internal thread) intended to receive said male threaded end of the protective conduit.
    The different parts of the cable gland 1 that are the body 2, the nut 4 and the sleeve 5 are preferably made as a single piece of metallic material, of brass, steel, bronze or aluminum type for example, or else of rigid plastic material, polyamide type for example.
    As best seen in Figures 2-5, for the connection of the tubular connection sleeve 5 with the cable gland, the sleeve 5 comprises a connection bore 52, opposite the threaded bore 51, mounted by an adjustment to force on a cylindrical external surface 42 of the end portion 41 of the annular nut 4. The axes of the sleeve 5 and of the nut 4 coincide with the axis of the body 2 on which the nut 4 is mounted. More specifically, the connection bore 52 of the sleeve 5 comprises a cylindrical internal surface 53, defining a smallest internal diameter of the connection bore 52, on which an annular groove 54 is formed, defining a largest internal diameter of the connection bore 52, while the external surface 42 of the end portion 41 of the nut 4 has a raised surface 43, arranged so as to engage in the annular groove 54 of the bore connection 52 of the sleeve when the latter is forcibly mounted on the end portion 41 of the nut 4, for example by means of a press, in the direction of introduction symbolized by the arrow F. In this way, the engagement of the raised surface 43 of the end portion 41 of the nut 4 in the annular groove 54 of the connection bore 52 of the sleeve 5 allows the sleeve to be retained on the end portion 41 of the eCRO u 4 and also allows the free rotation of the sleeve 5 around the end portion 41 of the nut 4.
    In other words, this relief surface 43 of the external surface 42 of the end portion 41 of the nut 4 is dimensioned so as to provide interference with the smallest internal diameter of the connection bore 52, and forms thus a non-return stop for the sleeve due to this interference.
    In practice, according to a first embodiment as illustrated in Figures 1-5, this interference can be obtained by a tight fit between the raised surface 43 of the external surface 42 of the end portion 41 of the nut 4 and the internal surface 53 of the connection bore 52 of the sleeve 5. Thus, the raised surface 43 of the external surface 42 of the end portion 41 of the nut 4 and the internal surface 53 of the bore connection 52 are dimensioned so as to make a tight fit, for example a tight fit of standard type H7p6, between these two surfaces.
    With reference to FIG. 6, according to an alternative or complementary embodiment, provision is made for the relief surface of the external surface 42 of the end portion 41 of the nut 4 to be a knurled surface 43 ’. By knurled surface is meant that the surface in question is striated in the longitudinal direction, materialized by the axis XX, by a set of longitudinal grooves forming a succession of hollows and ridges, in order to favor mounting by force adjustment. of the sleeve 5. In this way, the internal surface 53 of the connection bore 52 of the sleeve engages on the ridges of the knurled relief surface 43 ′ during the force fitting, which allows the tolerances to be relaxed. adjustment of the connection bore of the sleeve on the end portion of the nut, due to the greater deformation capacity of the knurled surface.
    Furthermore, with a view to favoring the rotation of the connection sleeve 5 around the nut 4 after it has been force-fitted, the external surface 42 of the end portion 41 of the nut 4 comprises an annular groove 45, arranged in downstream of the raised surface 43 relative to the direction of introduction F of the sleeve 5, into which an O-ring 46 is inserted, adapted to come into contact with the internal surface 53 of the connection bore 52 of the sleeve 5. The seal 46 makes it possible to increase the friction during the rotation of the sleeve 5 in order to have a controlled rotation of the latter, as opposed to a crazy rotation, while ensuring the seal between the external surface 42 of said nut and the internal surface 53 of the connection bore 52 of the sleeve. The O-ring 46 can be made of elastomeric material or natural rubber and is for example made of silicone.
    The connection sleeve 5 may have at its end receiving the end portion 41 of the annular nut 4, a chamfer 55, the relief surface 43 of the end portion 41 comprising, opposite this chamfer 55, a chamfer complementary 44. Thus, when the sleeve 5 is forcibly mounted on the end portion of the nut 4, the chamfer 55 of the sleeve 5 and the complementary chamfer 44 of the raised surface 43 of the end portion of the 'annular nut 4 cooperate to facilitate the forced mounting of the sleeve. The chamfer 55 is preferably a rounded chamfer, or radius, making it possible to preserve the integrity of the O-ring when the sleeve is force-fitted onto the end portion of the nut.
    In addition, the end portion 41 of the annular nut 4 also has an external centering surface 47, arranged downstream of the annular groove 45 relative to the direction of introduction F of the sleeve 5. Thus, after mounting in force of the sleeve 5 on the nut 4, this external centering surface 47 is intended to cooperate with the internal surface 53 of the connection bore 52 of the sleeve 5 coming opposite, leaving a functional clearance between them, so ensuring the centering of the sleeve 5 on the end portion 41 of the nut 4. In the same way, the part of the internal surface of the end portion 41 of the nut 4 disposed upstream of the surface in relief 43 relative to the direction of introduction F of the sleeve 5, ensures the centering of the sleeve 5 before it is force-fitted.
    With regard to the order of attachment of the parts, it is preferably possible to first attach and fix the nut 4 on the body 2 of the cable gland, by screwing the nut 4 on the body, then, then, attach force the sleeve 5 on the nut 4. However, one could perfectly, without departing from the scope of the invention, consider a reverse order, consisting in attaching and first fixing the sleeve 5 on the nut 4, before put the whole back on the body 1.
    The solution which has just been described for the connection of the cable gland to a threaded conduit is not limited to a type of cable gland in particular and, in particular, the method of assembly of the connection sleeve free in rotation s applies just as well to a cable gland for an unarmoured cable as to a cable gland for an armored cable.
    权利要求:
    Claims (7)
    [1" id="c-fr-0001]
    1. Cable gland (1) adapted to be placed on a wall of an enclosure to ensure a watertight passage of an electric cable passing through said wall, said electric cable being brought to the enclosure under a protective conduit comprising a connection thread with said cable gland, said cable gland comprising a tubular body (2) having a threaded end (21) for fixing to said wall, said tubular body enclosing a compressible sealing ring (3), a nut annular (4) adapted to be screwed onto a threaded end (24) of said tubular body opposite to said threaded end, to compress said sealing ring and, in connection with said annular nut, to an end portion (41) of said annular nut opposite to said tubular body, a tubular connection sleeve (5) having a threaded part (51) adapted to cooperate by screwing with said connection thread ement of said protective conduit, characterized in that said tubular connection sleeve (5) comprises a connection bore (52) mounted by a press fit on an external surface (42) of said end portion of said annular nut, said sleeve having an annular groove (54) on an inner surface (53) of said connecting bore and said outer surface of said end portion of said nut having a raised surface (43, 43j, arranged to engage in said annular groove when said connection bore is force-fitted on said end portion, said engagement of said relief surface in said annular groove thereby retaining said sleeve on said end portion of said nut and allowing free rotation of said sleeve around said end portion of said nut.
    [2" id="c-fr-0002]
    2. Cable gland according to claim 1, characterized in that the external surface (42) of said end portion (41) of said nut comprises an annular groove (45) disposed downstream of said raised surface (43, 43j relative to the direction of introduction of said sleeve, into which is inserted an O-ring (46) adapted to come into contact with the internal surface (53) of said connection bore (52) of the sleeve, making it possible to increase the friction during the rotation of said sleeve to have a controlled rotation, while ensuring the seal between the external surface (43) of said nut (4) and said internal surface (53) of the connection bore of said sleeve.
    [3" id="c-fr-0003]
    3. Cable gland according to claim 2, characterized in that said end portion (41) of said nut (4) comprises an external centering surface (47), disposed downstream of said annular groove (45) relative to the direction of introduction of said sleeve (5), adapted to cooperate with said internal surface (53) of the connection bore (52) of the sleeve (5) coming opposite, leaving a functional clearance between them, so as to ensure centering the sleeve (5) on the end portion (41) of the nut (4).
    [4" id="c-fr-0004]
    4. Cable gland according to any one of claims 1 to 3, characterized in that said internal surface (53) of said connection bore and said raised surface (43, 43 ') of the external surface of said portion of end of said nut are dimensioned so as to make a tight fit, for example of standard type H7p6, between these two surfaces.
    [5" id="c-fr-0005]
    5. Cable gland according to any one of the preceding claims, characterized in that said raised surface is a knurled surface (43 ’).
    [6" id="c-fr-0006]
    6. Cable gland according to any one of the preceding claims, characterized in that said tubular connection sleeve (5) has a rounded chamfer (55) at its end receiving said end portion of said annular nut, said raised surface of the external surface of said end portion comprising, opposite said rounded chamfer, a complementary chamfer (44).
    [7" id="c-fr-0007]
    7. A cable gland according to any one of the preceding claims, characterized in that said tubular connection sleeve (5) comprises a threaded bore (51) opposite to said connection bore (52), intended to receive a male threaded end of said protective conduit.
    类似技术:
    公开号 | 公开日 | 专利标题
    EP1553661A1|2005-07-13|Electrical connecting device for realising a metallisation point, support having such a connecting device and airplane equipped with such a support
    CA3035185A1|2019-08-27|Cable input device for electrical cable in a conduit
    FR2696049A1|1994-03-25|Electrical connector with threaded ring and preponderance lock.
    FR2497905A2|1982-07-16|DOUBLE FLEXIBLE O-RING
    EP1249914B1|2004-09-29|Cable guide for sealed housing and sealing assembly comprising such a guide
    FR2897402A1|2007-08-17|DEVICE FOR SEPARATING OBJECTS USING A GAS
    EP3601860B1|2022-02-09|Gland for a sealed feedthrough of an orifice of a partition
    EP0206896A1|1986-12-30|Modular stuffing box suitable for passing a cylindrical conduit through a wall
    EP0763876A1|1997-03-19|Device for blocking a cable in an explosion-proof housing
    FR2655122A1|1991-05-31|Seal for an electrical connector, and connector which is equipped therewith
    WO2020183111A1|2020-09-17|Device for connecting an electric wiring harness to the rear of an electrical connector
    WO2015135998A1|2015-09-17|Bolted connection
    EP3525292A1|2019-08-14|Electrical connector for connecting a cable for transmitting electric energy and a conductor
    FR2903242A1|2008-01-04|Cable lead through clamp for roller shutter, has cable locked in cable conduit against traction force exerted on cable, when surfaces are maintained with respect to each other, where portion of cable is inserted in conduit
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    EP0392908A1|1990-10-17|Joint for pipes
    FR2967751A1|2012-05-25|Banjo type fitting for connecting pipe with flexible or rigid body in automotive industry, has seal including bores offset relative to each other in absence of external constraint, and screw tending to align bores by deformation of seal
    FR2707765A1|1995-01-20|Axially locking optical connection plug and connection assembly comprising same.
    FR2768269A1|1999-03-12|CABLE GLAND PROVIDED WITH MEANS OF IDENTIFICATION
    FR2694367A1|1994-02-04|Connecting device for hydraulic circuits - comprises male end with groove having watertight joint and socket, with gripping arrangement forcing joint to deform assuring watertight connection
    FR2619470A1|1989-02-17|ELECTRICAL CONNECTION DEVICE
    FR2778795A1|1999-11-19|Cable grip providing sealed joint around cable length
    FR2591308A1|1987-06-12|Adjustable adaptor, especially for pipeline elements
    FR2513347A1|1983-03-25|Rotating male threaded flexible pipe connector - has outer rotating component with O=ring seals and external thread
    同族专利:
    公开号 | 公开日
    GB2573374B|2021-12-29|
    DE102019001136A1|2019-08-29|
    KR20190103044A|2019-09-04|
    GB201902268D0|2019-04-03|
    US20190267781A1|2019-08-29|
    CA3035185A1|2019-08-27|
    CN110198019A|2019-09-03|
    FR3078449B1|2020-03-06|
    GB2573374A|2019-11-06|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP0490637A1|1990-12-10|1992-06-17|C M P Limited|Disconnectable cable gland assembly|
    GB2276773A|1993-03-30|1994-10-05|British Engines Ltd|Cable gland|
    GB2296998A|1995-01-10|1996-07-17|Hawke Cable Glands Ltd|Cable gland|
    FR2528533B1|1982-06-09|1986-04-11|Capri Codec Sa|THREADED CONNECTION WITH ROTATING NUT FOR EXTERNAL SPIRAL SHEATH|
    FR2590959B1|1985-11-29|1988-05-13|Capri Codec Sa|CABLE GLAND ADAPTABLE TO THE CROSSING OF A PARTITION BY A CYLINDRICAL PIPING|EP3886281A1|2020-03-24|2021-09-29|ABB Schweiz AG|Feedthrough assembly|
    CN112228640A|2020-11-03|2021-01-15|赵晓庆|Sealing joint convenient to install for hydraulic pipe|
    法律状态:
    2019-01-23| PLFP| Fee payment|Year of fee payment: 2 |
    2019-08-30| PLSC| Publication of the preliminary search report|Effective date: 20190830 |
    2020-01-22| PLFP| Fee payment|Year of fee payment: 3 |
    2021-01-20| PLFP| Fee payment|Year of fee payment: 4 |
    2022-01-19| PLFP| Fee payment|Year of fee payment: 5 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1851720|2018-02-27|
    FR1851720A|FR3078449B1|2018-02-27|2018-02-27|CABLE INPUT DEVICE FOR CONDUCTED ELECTRIC CABLE|FR1851720A| FR3078449B1|2018-02-27|2018-02-27|CABLE INPUT DEVICE FOR CONDUCTED ELECTRIC CABLE|
    DE102019001136.8A| DE102019001136A1|2018-02-27|2019-02-15|Cable entry device for an electrical cable received in a cable|
    GB1902268.0A| GB2573374B|2018-02-27|2019-02-19|Cable entry device for electrical cable housed in a conduit|
    KR1020190022295A| KR20190103044A|2018-02-27|2019-02-26|Cable entry device for electrical cable housed in a conduit|
    CN201910145038.0A| CN110198019A|2018-02-27|2019-02-27|Cable for accommodating cable in the catheter enters device|
    US16/286,695| US20190267781A1|2018-02-27|2019-02-27|Cable entry device for electrical cable housed in a conduit|
    CA3035185A| CA3035185A1|2018-02-27|2019-02-27|Cable input device for electrical cable in a conduit|
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