WO1996019024A1 - Dispositif d'etancheite - Google Patents

Dispositif d'etancheite Download PDF

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Publication number
WO1996019024A1
WO1996019024A1 PCT/GB1995/002905 GB9502905W WO9619024A1 WO 1996019024 A1 WO1996019024 A1 WO 1996019024A1 GB 9502905 W GB9502905 W GB 9502905W WO 9619024 A1 WO9619024 A1 WO 9619024A1
Authority
WO
WIPO (PCT)
Prior art keywords
sealing
port
strip
sealing material
sealing device
Prior art date
Application number
PCT/GB1995/002905
Other languages
English (en)
Inventor
Jacques Brusselmans
Hendrik Graulus
Paul Hoeterickx
Original Assignee
N.V. Raychem S.A.
Raychem Limited
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
Priority claimed from GBGB9425024.8A external-priority patent/GB9425024D0/en
Priority claimed from GBGB9507986.9A external-priority patent/GB9507986D0/en
Application filed by N.V. Raychem S.A., Raychem Limited filed Critical N.V. Raychem S.A.
Priority to AU41833/96A priority Critical patent/AU4183396A/en
Publication of WO1996019024A1 publication Critical patent/WO1996019024A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/08—Cable junctions
    • H02G15/10—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/013—Sealing means for cable inlets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/08—Cable junctions
    • H02G15/10—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes
    • H02G15/113—Boxes split longitudinally in main cable direction
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439—Auxiliary devices
    • G02B6/444—Systems or boxes with surplus lengths
    • G02B6/4441—Boxes
    • G02B6/4446—Cable boxes, e.g. splicing boxes with two or more multi fibre cables
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439—Auxiliary devices
    • G02B6/444—Systems or boxes with surplus lengths
    • G02B6/4441—Boxes
    • G02B6/4446—Cable boxes, e.g. splicing boxes with two or more multi fibre cables
    • G02B6/4447—Cable boxes, e.g. splicing boxes with two or more multi fibre cables with divided shells

Definitions

  • the present invention relates to the formation of an environmental seal, particularly for ports in cable splice cases, ducts, or other housings.
  • a cable splice case (or termination) will in general comprise a housing that surrounds the splice itself, and some form of seal at an outlet or other port of the housing which blocks any gap between the housing and the cable.
  • the housing may also include means for holding fibre splices and/or means for organizing loops of optical fibres.
  • US 2771502 (Bell Telephone Laboratories) discloses seals at the ends of a splice case comprising resilient rubber bushings which surround a cable sheath and are forced into gas-tight contact with the sheath and with the interior wall of the case. This is achieved by tightening bolts which pass through the rubber bushings.
  • a further device having compressible end seals is disclosed in WO 90/0540 (Raychem), but in this case the sealing material used comprises a gel.
  • US 5007701 Windsor Communications Inc
  • US 4332975 Thimas and Betts Corporation
  • GB 2161993 Shariff
  • EP 0386299 Wild Rose
  • bolts serve to compress a sealing material axially by acting on washers or other plates either side of the sealing material. This axial compression results in a radial expansion of the sealing material causing it to seal inwardly against the cable and outwardly against the surrounding housing. It is in general friction resulting from the radial expansion that keeps the whole sealing device in place within the housing. Assembly and disassembly of such seals will usually be rather slow because of the need to provide special tools, such as spanners. Also, the sealing material is in general disrupted by the bolt which of necessity passes through it.
  • a port sealing device which comprises:
  • the invention also provides a sealing member which can be spirally-wrapped and which comprises:
  • one or both of the support strips having means for maintaining the sealing member in a spirally-wrapped configuration.
  • That sealing member may be used in conjunction with one or more cable housing end parts which have one or more holes within which the sealing member is positioned and through which the cable passes.
  • Such an end part is positioned at an end of a cylindrical or other cable splice housing.
  • a cable can be positioned at any desired position within the housing, eg it can be eccentric rather than axial.
  • more than one cable can exit each end of the housing.
  • the invention further provides an end part for a cable splice housing which comprises:
  • an end member that can be positioned at an end of a housing and that has at least one hole within which a sealing member can be positioned, and through which a cable can pass; and (ii) said sealing member, which comprises a strip of sealing material and a first support strip attached to and extending along a longitudinal edge of the sealing strip.
  • the hole in the end member may have a circumferentially-extending groove in which the support strip can be located.
  • the end member may have two circumferentially-extending grooves, receiving respective support strips.
  • the support strip or strips preferably lie in substantially the same plane on the sealing material and are preferably of substantially the same thickness.
  • the support strip or strips are preferably bonded or otherwise attached to extreme edges of the sealing material, but there may be some overlap. Considerable or complete overlap might be disadvantageous since it would restrict the design of the means for maintaining the member in the wrapped configuration. Such means would then preferably either penetrate the overlapped layer of sealing material or be provided at the outwardly facing edges of the support strip.
  • a sealing device may also be provided for sealing a port in a cable housing, comprising: a sealing material; displacement means which when biased towards the sealing material puts it under pressure; and resilient or other biasing member for biasing the displacement means thereby putting the sealing material under pressure; wherein the sealing device has attachment means for removably attaching it to a cable housing, which attachment means is separate from the displacement means and from the compressible sealing material, and wherein the biasing means is activated by positioning of the end seal on the housing such as to allow or to cause attachment thereto.
  • attachment means with rapid and positive action.
  • Any suitable attachment means may be used but we prefer a bayonet arrangement in which for example a curved groove terminates in a recess in which a pin is held, the action of the biasing means holding the pin in place against accidental removal. It is preferred to provide such a groove on the removable sealing device and to provide the pin on the housing or port thereof.
  • the housing with which the invention is used may house for example a cable splice or cable termination at any point in a communications or power distribution network. For example, cable splices in a coaxial cable, copper pair cable or fibre cable network may be sealed using the invention.
  • the housing may be formed principally from a conductive material, perhaps with an insulating outer or inner coating. Alternatively, it could be formed principally from an insulating material and have a conductive coating. In many instances, particularly in the case of power cables, it may be desirable that the housing be filled, for example with a gel, in order to avoid any air gaps.
  • the man skilled in the art after reading this specification, will be able to select sealing materials that are suitable for use in the device and in the sealing member of the invention.
  • the material is preferably sufficiently soft that it can be biased by the biasing member of the device, particularly so that it can be axially compressed when in the port of the housing and as a result be radially expanded to contact the wall of the port and any cable passing through it.
  • the material should additionally be resistant to water and sufficiently rugged that it be able to withstand installation and, preferably, several so-called re-entries.
  • the material have a Stevens Voland hardness from of at least 30, preferably at least 50. Preferred maximum values are 150g, preferably lOOg and most preferably 70g.
  • Stevens Voland hardness is measured on a Stevens LFRA Texture Analyser having a stainless steel circular spindle of diameter of about 0.64cm, the measurement being taken at a penetration of 4mm.
  • the material preferably has a certain elasticity, and in particular preferably has an elongation to break of at least 100%, preferably at least 200%, more preferably at least 300%.
  • a preferred class of materials is that of liquid-extended polymers, in particular oil-extended polymers.
  • Preferred materials may be classified as gels, such as those disclosed in US 4634207 (Debbaut), the disclosure of which is incorporated herein by reference. Gels may be thermosetting or thermoplastic.
  • Suitable materials for the gel can be made by gelling a curable polyurethane, a silicone or a suitable block copolymer in the presence of substantial quantities of a mineral oil, a vegetable oil or a plasticizer.
  • any of these materials can be used, but we particularly prefer a gel that comprises an extender oil with a styrene di- and/or tri- block copolymer.
  • SEBS styrene-ethylene-butylene-styrene
  • Suitable block copolymers of these types are marketed under the Trade Marks Kraton and Septon.
  • the amount of block copolymer, relative to the amount of oil, can be varied to achieve the desired softness.
  • Preferred Kraton-based gels may contain between 5 and 25% more preferably between 10 and 25% by weight of Kraton block copolymer.
  • gels and of rubbers are materials such as soft rubbers.
  • An advantage of gels and of rubbers is that their cohesive strength is greater than their adhesive strength to cables and other commonly encountered substrates, and as a result they can be readily and cleanly removed.
  • Gels may however excel over rubbers in that they can be softer and can wet the substrate to be sealed and themselves when overlapped, thereby achieving a superior seal.
  • Some surface tackiness may be desirable and this can be controlled by varying the oil content of the gel and by dusting with talc or other paniculate material.
  • the first stop (b) referred to above as being part of the sealing device preferably comprises an inwardly-extending projection within the port.
  • a projection may be annular with respect to the port and result from a narrowing of the diameter of the port.
  • the second stop (c) preferably comprises an outwardly extending projection outside the port.
  • Such a projection preferably serves to retain on the outside of the port a cover (e) that can be slid onto the port to engage the second stop and that carries the resilient member (d).
  • This projection may comprise a pin that forms part of a bayonet connection, the cover having a curved groove therein along which the pin slides. Thus, the cover can be pushed onto the port and rotated slightly to lock it in position.
  • the act of pushing it on to the port may cause the biasing member to be deformed thus putting the sealing material (a) within the port under pressure.
  • the first stop prevents the sealing material from creeping too far into the port. As a result, the sealing material is maintained under pressure during service life of the product.
  • the resilient member (d) interconnects a first portion of the cover that abuts or otherwise engages the second stop (c) and a second portion that abuts or otherwise engages the sealing material.
  • the resilient member (d) may bias a sealing material by its being under tension or under compression.
  • Member (d) may comprise any suitable material for storing energy such as a metal spring, an elastomer such as a rubber or a foam.
  • the second portion of the cover may comprise a slidable piston, at least part of which can slide within the port.
  • the sealing device In some circumstances it may be inconvenient or impossible to install the sealing device over a free end of a cable entering a housing (the cable may be already connected to another cable within the housing), and in this case it will be preferred that the sealing device be of so-called wrap-around design.
  • wrap-around is well-known in the art and simply means that an article can be installed around an intermediate portion of an elongate article without access to its free ends.
  • the sealing member of the invention which preferably provides the sealing material referred to above in connection with the device of the invention, is preferably in strip form such that it can be wrapped, usually spirally-wrapped, and then placed in the port.
  • sealing member When we refer to the sealing member being "spirally-wrapped" we do not require that each layer precisely overlap the underlying layer, although that is preferred. In preferred embodiments, however, we exclude helical wrapping that extends a significant distance axially.
  • a sealing member alone may be spirally-wrapped, or it may be wrapped-around a blank plug or around a pressure access valve or other article. Where an ingoing cable is to be sealed in a port the sealing member will be wrapped around the cable and then slid axially into the port.
  • any sealing material involved it will usually be necessary for any sealing material involved to be placed under a pressure sufficient to counteract any pressure tending to displace it.
  • a housing is to be internally pressurized, an inwardly directed force must be applied to the sealing material to balance this internal pressurization.
  • a housing may be required to resist an. external pressure (for example that generated by an external head of water), and in this case an outwardly directed force must be applied to the sealing material. If the sealing material is not to creep excessively as a result of these forces it must be retained in such a way as to minimize any voids along which it could creep.
  • the sealing member comprises a strip of sealing material, such as a gel, and one or two support strips attached to and extending along one or both longitudinal edges of the strip.
  • a single strip provides both the sealing material and its own means of being retained.
  • the edge support strips form a substantially rigid, self- supporting, dam adjacent the sealing material.
  • the or each support strip preferably has means for maintaining the sealing member in a spirally-wrapped configuration. Such means may prevent the sealing member from uncoiling in an essentially radial direction and/or from telescoping axially.
  • the support strips may comprise a rubber or other (preferably thermoplastic) elastomeric material, in particular one having shore A hardness between 80 and 100, particularly between 85 and 95, especially about 90.
  • the strips may comprise a harder material, such as polypropylene or other engineering plastic that has lines of weakness or other means for facilitating its wrapping around a cable etc.
  • the support strips may comprise strips of Velcro (trademark) or other frictionally self-engaging material. The material is preferably chosen for ease and strength of bonding to a gel, and more preferably to allow formation of the sealing member by co-extrusion or co-moulding of the gel together with the support strip or strips. An olefinic material may be preferred.
  • Opposite surfaces of the support strip may cooperate with one another when the support member is spirally- wrapped, for example one of the surfaces may have at least one protrusion along its length, and the opposite surface may have at least one recess along its length.
  • the protrusions and recesses of adjacent layers of the sealing member can therefore engage one another and maintain the sealing member in the spirally- wrapped configuration.
  • At least the recess, and preferably both the recess and protrusion are continuous and preferably of constant cross-sectional size, along the length of the strip in order that any part of the strip can overlie any other part when it is spirally-wrapped. In this way, the member can be wrapped around a cable of any diameter.
  • the member can then be used to build up a cable of any size to seal it within a port of any size.
  • the member may in general simply be cut to the desired length.
  • This ability to build-up a cable diameter means that excellent results can be achieved with only one or two sizes of sealing device to cover all cable sizes generally encountered.
  • One device may for example be made for cables of, say 10-25 mm diameter, and another for cables of 25-40 mm diameter.
  • the sealing member have two such support strips, one either side of the sealing material.
  • the sealing material will then be contained between two cylindrical structures. It is preferred that at least one of these cylindrical structures be capable of sliding axially (for example along a cable) in order that the sealing material between the cylindrical structures be able to put under pressure.
  • the other cylindrical structure is preferably secured either to a cable or to the port, for example by abutting the first stop (b). This ability to slide or to be located may result from a characteristic of respective support strips, one of which may have a roughened or adhesive (such as a pressure-sensitive adhesive) surface and the other of which may have a smooth surface or a coating of a low- friction material.
  • a support strip may be located by an additional member, for example one that extends from the support strip and is wrapped around or otherwise secured to the cable.
  • the housing may be of any suitable design and have any suitable number of ports. It may, for example, be a substantially box-like structure that is longitudinally split through the ports to produce first and second housing parts, such as a base and a cover. When these parts are brought together they define a substantially closed space, for example for housing a cable splice, in communication with the ports through which the cables enter.
  • the first and second housing parts will in general need to be sealed together and each may be provided with means for retaining a seam seal between them.
  • This means for retaining may comprise a peripheral groove in one or more of the housing parts within which can be placed a gel or other seam seal. This groove preferably breaks into a wall of the port such that the seam seal contacts the sealing material of the sealing device or of the sealing member of the invention. Such a seam seal may terminate at the port, and an end of it abut the sealing material of the ⁇ r
  • the seam seal could be continuous (at least at the portion of the housing with which we are concerned) and extend across the sealing material of the device.
  • Figure 1 is a perspective view of a housing showing a sealing device sealing cables entering the housing;
  • Figure 2 is a partial perspective view of one part of the housing
  • Figure 3 is a plan view of one part of the housing
  • Figures 4A and 4B are side and end elevations of one part of the housing
  • Figure 5 shows in cross section a sealing device and sealing member of the invention on a port of a housing
  • Figures 6A and 6B are an end view and a cross-section of a cover of a sealing device
  • Figures 7A and 7B are an end view and a cross-section of a slidable piston of a sealing device of the invention.
  • Figure 8 shows an alternative embodiment to that of figure 5
  • Figure 9 shows the sealing device of figure 8 after installation
  • Figure 10A shows a sealing member of the invention in cross-section
  • Figure 10B shows in partial cross-section the sealing member of figure 10A after spiral- wrapping
  • Figures 11 A and 1 IB show a wrap-around cover of a sealing device of the invention
  • Figures 12 A, 12B and 12C show a wrap-around sliding piston of a sealing device of the invention.
  • Figures 13A and 13B are an end view and a transverse cross-section of an end member for use with a sealing strip such as that shown in Figure 10.
  • Figure 1 shows a cable splice case housing (1) forming an environmental seal around a splice between cables (2) that enter the housing through ports (3).
  • the cables (2) are sealed within the port (3) by means of a port sealing device (4) of the invention.
  • the housing (1) can be seen to comprise two parts joined at a split plane (5).
  • the sealing device (4) can be seen to be positioned over the port and locked in position by a bayonet fixing comprising a pin (6) attached to the port (3) and a slot (7) in the device (4).
  • the device (4) is therefore slid over the port (3) and turned slightly to lock it in position.
  • Figure 2 shows the lower part of the housing (1) of Figure 1.
  • the upper face of the housing part at the split plane (5) can be seen to have a groove (8) in its peripheral walls that acts as a means for locating a seam seal that seals the housing part to a similar part (not shown) that in use would be placed above it.
  • the groove (8) can be seen to break into a wall of the port (3) at positions (9).
  • a sealing material positioned in the port (3) as part of sealing device (4) (see figure 1) will contact a seam seal placed in groove (8).
  • the sealing material of the sealing device together with the seam seal in groove (8) will therefore form, together with the housing itself, a complete barrier between the inside and outside of the housing.
  • Figure 2 also shows a first stop (10) in the form of an inwardly-extending annular projection within port (3).
  • This stop serves to prevent sealing material in port (3) from moving excessively axially inwardly along the port.
  • the sealing material can therefore be put under pressure from the outside of the housing without it creeping excessively.
  • the seam seal may comprise any suitable gasket or other device, for example a rubber or other elastomer or a gel.
  • FIG. 3 The plan view of a housing (1) shown in Figure 3 additionally shows means (11) such as pins and holes for aligning the part of the housing illustrated with a similar part which in use is overlie it.
  • Figure 4 A and 4B are respectively side and end elevations of the housing part shown in Figure 3.
  • Figure 5 is a cross section through part of a housing such as that shown in Figure 1 and taken perpendicular to the split plane (5).
  • the housing (1) is used to seal a splice (not shown) to a cable (2) that enters through port (3).
  • the device of the invention (4) has been partially slid over port (3) and is about to engage bayonet pins (6) which will slide into slot (7) in the cover (13) of the device (4).
  • the bayonet pins (6) can be seen to have heads (12).
  • heads (12) may be useful if cover (13) is of wrap-around design, being split in a plane perpendicular to the plane of the paper of Figure 5.
  • the heads (12) can therefore prevent a top part of cover (13) moving upwards as drawn, and prevent a lower part of cover (13) moving downwards as drawn.
  • the cover (13) carries a slidable piston (14) which is attached to it by compression springs (15).
  • sealing material (16) As the device (4) is moved to the right as drawn to slide it over the port (3) piston (14) will abut sealing material (16). Further movement of device (4) to the right will apply pressure axially to the sealing material (16) causing its radial expansion to seal to the port (3) and to the cable (2). Excessive movement of the sealing material (16) to the right as drawn is prevented by the annular projection (10) which constitutes the so called first stop.
  • the sealing material is shown as a wrap of sealing material as is preferred (the layers are shown separated merely for clarity), but it could comprise concentric tubes or a single cylinder of material or a pair of half cylinders etc.
  • Figures 6A and 6B are an end elevation and a cross section of the cover shown in Figure 5.
  • the cover is of wrap-around design the upper and lower parts being joined together at split plain (17).
  • recesses (18) can be seen for housing the springs (15) in Figure 5. It can be seen that four such springs are provided in this embodiment although more or fewer could be provided if desired.
  • the force exerted by the springs should be chosen so that it just exceeds the opposite force, acting to the right as drawn in Figure 5, that results from any internal pressure in the housing (1). In this way a good seal can be maintained without excessive creep of the sealing material (16) and without any damage to it occurring.
  • the sealing material comprises a gel it is desirable that it be subjected only to low pressures in order that oil-separation be reduced to a minimum.
  • An internal pressure of 40 kPa may be regarded as typical and such a pressure can be slightly more than compensated for by the use of four coil compression springs each having a resilience of 2 N/mm which are compressed by from, say, 6 to 8 millimetres when the sealing device (4) is installed. This results in a force of about 56 N being applied to the sealing material. In general a force from 40 to 70, more preferably 50 to 60 N will be suitable.
  • Figures 7 A and 7B show a wrap-around slidable piston (14) the parts of which are joined together at split plane (19). As in the case of the cover (13), recesses (20) are provided for the coil springs shown in Figure 5.
  • the part (21) of the piston (14) is of such a diameter that it can be slid into port (3) of Figure 5 as far as the annular web (22) will allow.
  • FIG 8 shows an alternative to the design shown in Figure 5.
  • biasing member (23) which will be put under tension, is provided as an alternative to the compression springs (15) of Figure 5.
  • the layers of sealing material (16) are shown separated for clarity.
  • Figure 9 shows the situation after the cover (13) has been fully slid onto port (3) and rotated to lock the bayonet fitting.
  • the biasing member (23) can be seen to have become elongated and therefore under tension.
  • Such a biasing member may comprise a cylindrical web of rubber or other suitable material.
  • the sealing material (16) can be seen to have been axially compressed and radially expanded to provide the desired seal.
  • a sealing member of the invention, and suitable for use in the sealing device described above, is shown in Figure 10A. It is shown in transverse cross-section, and will be provided as a strip extending perpendicular to plain of the paper of Figure 10A.
  • the sealing member (24) comprises a strip of sealing material (16) (extending perpendicular to the plain of the paper), a first support strip (25) (again extending perpendicular to the plain of the paper), and a second support strip (26) (again extending perpendicular to the plain of the paper).
  • the support strips (24), (25) and (26) have means for maintaining the sealing member in a spirally wrapped configuration. Such spiral-wrapping is illustrated by the separate layers of sealing material (16) in Figures 5 and 8.
  • the means for maintaining comprises a recess (27) extending along 1 surface of each support strip, and a protrusion (28) extending along an opposite surface.
  • each strip may comprise discrete pieces, extending transversely with respect ot the sealing member and spaced out along its length. They may be held together by the sealing material or by some other means such as a rod or wire or cord. Such a series of pieces will have the form of a strip in envelope at least, and the term "strip" is intended to include such a design.
  • Figure 10B which shows only half of the spiral wrap, namely that part lying above cable (2), also shows a first stop (10) and a piston (14) by means of which the sealing material (16) is deformed.
  • means such as a roughened or adhesive surface or layer (29) maybe provided to restrict movement of the end block (30) that has resulted from wrapping of the second support strip (26).
  • a smooth or other low friction surface or layer (31) may be provided to facilitate sliding of the end block (32) that has resulted from wrapping of the first support strip (25).
  • These end blocks (30) and (31) are preferably substantially rigid and self-supporting.
  • the piston (14) or other displacement means and/or the first stop (10) preferably act as shown at a portion of the sealing material that is radially spaced from the cable (or axis of the sealing material where no cable is present), particularly over an annular surface. The resulting spacing of the piston and stop from the axis allows cables of a range of sizes to be sealed.
  • Figures 11 and 12 show details of the wrap-around nature of cover (13) and piston (14).
  • cover or piston In each case half of the cover or piston is shown, the parts shown being mateable with a similar part by means of pins (33) and recesses (34), or by other engagable means such as a tongue-and-groove or a dove-tail fixture.
  • the parts of the piston and cover may therefore be assembled around a cable without requiring access to a free end of the cable.
  • the parts may be held together by an interference fit or by other means, at least while the sealing device is being installed on a port.
  • the tone-and-groove or dovetail fixture etc on the parts themselves, or the heads (12) of bayonet pins (6) (see Figure 5 for example) etc on the port can prevent the parts of cover (13) from separating.
  • Figures 13A and 13B show in end view and transverse cross-section along BB' respectively an end member 35 for a cable splice.
  • the end member preferably comprises a rubber or other suitable elastomeric material.
  • Two such end members 35 could be used, one either side of a cable splice with a surrounding generally cylindrical housing extending from one to the other, thereby enclosing the splice.
  • a more box-like or other structure could use an end member 35 in a port thereof, for example in port 3 of housing 1 as shown in figure 1.
  • An advantage of using an end member 35 is that more than one cable can easily be sealed within a single port.
  • the part illustrated in figure 13 has four holes 36 through each of which a cable may pass.
  • the holes 36 may be of the same or different diameter, depending on the sizes of the cables to be sealed.
  • the number of holes will of course depend on the number of cables to be sealed, although blanks can be provided to block unused holes if need be.
  • End member 35 may also be used if for some reason it is desired that a cable be positioned eccentrically, rather than axially, with respect to the port through which it is to pass.
  • a sealing member such as that illustrated in figure 10 may be wrapped around a cable and then positioned within a hole 36 to form an end part for a splice case.
  • the sealing strip forms a seal between the end member 35 and a cable it carries.
  • the end member may have slits 37 extending from each hole 36 to its periphery in order that cables and/or sealing strips may be laterally, rather than axially inserted into the holes 36.
  • the end member 35 may have a circumferentially-extending groove 38, for example around the wall of each hole 36. These grooves 38 may locate sealing strips or members such as those illustrated in figure 10. This may be achieved by engagement between grooves 38 and protrusions 28 of the innermost turn of the sealing strip (see figure 10A).
  • Each end member 35 may have first and second parts 35A and 35B that are axially separated, but preferably flexibly joined together such that the overall member can be axially compressed.
  • Each of the first and second parts 35A and 35B may be provided with grooves 38. The two grooves engage the projections on respective support strips (25, 26) at each side of the sealing material 16 (figure 10A).
  • the two support strips 25, 26 move together, causing the sealing material 16 to be axially compressed. That causes its radial expansion to seal to the cable and to the member 35.
  • Such axiall compression may be achieved, for example, by tightening a nut on a bolt that extends through hole 39.

Landscapes

  • Cable Accessories (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
  • Gasket Seals (AREA)

Abstract

Cette invention concerne un dispositif d'étanchéité d'une ouverture comportant les éléments suivants: (a) un matériau d'étanchéité (16) pouvant être placé dans une ouverture (3); (b) une première butée (10) destinée à limiter le mouvement du matériau d'étanchéité (16) le long de l'ouverture (3); (c) une seconde butée fixe par rapport à l'ouverture (3); (d) un élément de sollicitation (15) qui exerce une poussée sur le matériau d'étanchéité (16) vers la première butée (10) en prenant appui sur la seconde butée.
PCT/GB1995/002905 1994-12-12 1995-12-12 Dispositif d'etancheite WO1996019024A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU41833/96A AU4183396A (en) 1994-12-12 1995-12-12 Sealing device

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GBGB9425024.8A GB9425024D0 (en) 1994-12-12 1994-12-12 Sealing device
GB9425024.8 1994-12-12
GB9507986.9 1995-04-19
GBGB9507986.9A GB9507986D0 (en) 1995-04-19 1995-04-19 Sealing device

Publications (1)

Publication Number Publication Date
WO1996019024A1 true WO1996019024A1 (fr) 1996-06-20

Family

ID=26306148

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1995/002905 WO1996019024A1 (fr) 1994-12-12 1995-12-12 Dispositif d'etancheite

Country Status (3)

Country Link
AR (1) AR001330A1 (fr)
AU (1) AU4183396A (fr)
WO (1) WO1996019024A1 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0880212A2 (fr) * 1997-05-19 1998-11-25 N.V. Raychem S.A. Fermeture d'épissure de cable
WO1999056370A1 (fr) * 1998-04-28 1999-11-04 Tyco Electronics Raychem Nv Boitier
FR2780132A1 (fr) * 1998-06-23 1999-12-24 Pirelli Cables Sa Croisement entre un joint rond et un joint plat
FR2829631A1 (fr) * 2001-09-07 2003-03-14 Corning Cable Systems S A Flasque etanche notamment pour manchon de protection d'epissure
WO2003023930A1 (fr) * 2001-09-07 2003-03-20 Corning Cable Systems S.A. Bride de manchon de protection d'epissure et bague pour une bride de manchon de protection d'epissure
NL1013707C2 (nl) * 1998-12-01 2003-04-11 Felten & Guilleaume Ag Oester Inrichting voor het geleiden en omkeren van lichtgolfgeleiders.
WO2009029259A1 (fr) * 2007-08-27 2009-03-05 Tyco Electronics Corporation Ensemble d'étanchéité pour éléments allongés et procédés d'utilisation correspondants
CN102221735A (zh) * 2010-04-16 2011-10-19 泰科电子(上海)有限公司 光缆接头盒
NL2004694C2 (en) * 2010-05-10 2011-11-14 Draka Comteq Bv An assembly comprising at least one duct and at least one distribution box, and a method of mounting a distribution box to a duct.
DE102011122156A1 (de) * 2011-12-23 2013-06-27 Hemstedt GmbH Kabelverbindungsmuffenvorrichtung
DE102014107203A1 (de) * 2014-05-22 2015-11-26 Marco Systemanalyse Und Entwicklung Gmbh Lichtwellenleitersystem
CN105977898A (zh) * 2016-06-06 2016-09-28 济南轩天机电科技有限公司 电力系统电缆接头处防火防爆组合结构及其使用方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2111922A1 (de) * 1971-03-12 1972-09-21 Kind Dieter Prof Dr Ing Loesbare,hochspannungsfeste Dichtungsstelle fuer Leiteranordnungen
JPS5013585Y1 (fr) * 1970-08-07 1975-04-25
DE2743937A1 (de) * 1977-09-29 1979-04-05 Siemens Ag Dichtungsbandwickel aus dauerplastischer dichtungsmasse mit stuetzelementen bei kabelgarnituren
FR2583497A1 (fr) * 1985-06-17 1986-12-19 Capri Codec Sa Dispositif pour maintenir une canalisation a la traversee d'une paroi
WO1990005401A1 (fr) * 1988-11-09 1990-05-17 N.V. Raychem S.A. Ensemble de boitier
EP0487025A1 (fr) * 1990-11-20 1992-05-27 Kabushiki Kaisha Toshiba Fiche pour câble d'énergie électrique

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5013585Y1 (fr) * 1970-08-07 1975-04-25
DE2111922A1 (de) * 1971-03-12 1972-09-21 Kind Dieter Prof Dr Ing Loesbare,hochspannungsfeste Dichtungsstelle fuer Leiteranordnungen
DE2743937A1 (de) * 1977-09-29 1979-04-05 Siemens Ag Dichtungsbandwickel aus dauerplastischer dichtungsmasse mit stuetzelementen bei kabelgarnituren
FR2583497A1 (fr) * 1985-06-17 1986-12-19 Capri Codec Sa Dispositif pour maintenir une canalisation a la traversee d'une paroi
WO1990005401A1 (fr) * 1988-11-09 1990-05-17 N.V. Raychem S.A. Ensemble de boitier
EP0487025A1 (fr) * 1990-11-20 1992-05-27 Kabushiki Kaisha Toshiba Fiche pour câble d'énergie électrique

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0880212A2 (fr) * 1997-05-19 1998-11-25 N.V. Raychem S.A. Fermeture d'épissure de cable
EP0880212A3 (fr) * 1997-05-19 1999-12-01 N.V. Raychem S.A. Fermeture d'épissure de cable
WO1999056370A1 (fr) * 1998-04-28 1999-11-04 Tyco Electronics Raychem Nv Boitier
US6344615B1 (en) 1998-04-28 2002-02-05 Tyco Electronics Raychem N.V. Closure having an adjustable volume sealant chamber
FR2780132A1 (fr) * 1998-06-23 1999-12-24 Pirelli Cables Sa Croisement entre un joint rond et un joint plat
EP0967504A1 (fr) * 1998-06-23 1999-12-29 Cables Pirelli Croisement entre un joint rond et un joint plat
US6217032B1 (en) 1998-06-23 2001-04-17 Cables Pirelli Cross-over between a round seal and a flat seal
NL1013707C2 (nl) * 1998-12-01 2003-04-11 Felten & Guilleaume Ag Oester Inrichting voor het geleiden en omkeren van lichtgolfgeleiders.
FR2829631A1 (fr) * 2001-09-07 2003-03-14 Corning Cable Systems S A Flasque etanche notamment pour manchon de protection d'epissure
WO2003023930A1 (fr) * 2001-09-07 2003-03-20 Corning Cable Systems S.A. Bride de manchon de protection d'epissure et bague pour une bride de manchon de protection d'epissure
WO2009029259A1 (fr) * 2007-08-27 2009-03-05 Tyco Electronics Corporation Ensemble d'étanchéité pour éléments allongés et procédés d'utilisation correspondants
US7799995B2 (en) 2007-08-27 2010-09-21 Tyco Electronics Corporation Sealing assemblies for elongate members and methods for using the same
CN102221735A (zh) * 2010-04-16 2011-10-19 泰科电子(上海)有限公司 光缆接头盒
NL2004694C2 (en) * 2010-05-10 2011-11-14 Draka Comteq Bv An assembly comprising at least one duct and at least one distribution box, and a method of mounting a distribution box to a duct.
EP2386894A1 (fr) * 2010-05-10 2011-11-16 Draka Comteq B.V. Ensemble comportant au moins un conduit et au moins une boîte de distribution, et procédé d'assemblage d'une boîte de distribution sur un conduit
US8848347B2 (en) 2010-05-10 2014-09-30 Draka Comteq B.V. Assembly comprising at least one duct and at least one distribution box, and a method of mounting a distribution box to a duct
DE102011122156A1 (de) * 2011-12-23 2013-06-27 Hemstedt GmbH Kabelverbindungsmuffenvorrichtung
DE102014107203A1 (de) * 2014-05-22 2015-11-26 Marco Systemanalyse Und Entwicklung Gmbh Lichtwellenleitersystem
DE102014107203B4 (de) * 2014-05-22 2018-01-25 Marco Systemanalyse Und Entwicklung Gmbh Lichtwellenleitersystem
CN105977898A (zh) * 2016-06-06 2016-09-28 济南轩天机电科技有限公司 电力系统电缆接头处防火防爆组合结构及其使用方法
CN105977898B (zh) * 2016-06-06 2017-11-14 重庆天春科技有限公司 电力系统电缆接头处防火防爆组合结构及其使用方法

Also Published As

Publication number Publication date
AU4183396A (en) 1996-07-03
AR001330A1 (es) 1997-10-22

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