US20060231283A1 - Cable connector having fluid reservoir - Google Patents
Cable connector having fluid reservoir Download PDFInfo
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- US20060231283A1 US20060231283A1 US11/110,024 US11002405A US2006231283A1 US 20060231283 A1 US20060231283 A1 US 20060231283A1 US 11002405 A US11002405 A US 11002405A US 2006231283 A1 US2006231283 A1 US 2006231283A1
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- Prior art keywords
- fluid
- cable
- coupling
- fluid reservoir
- cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/53—Bases or cases for heavy duty; Bases or cases for high voltage with means for preventing corona or arcing
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- 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
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- 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
- H02G15/20—Cable fittings for cables filled with or surrounded by gas or oil
- H02G15/24—Cable junctions
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- Connector Housings Or Holding Contact Members (AREA)
- Cable Accessories (AREA)
Abstract
Description
- Embodiments of the present invention relate generally to cable connectors suitable for use with electrical power cables, and more particularly, to cable connectors, such as splice connectors, that interconnect at least two electrical power cables or cable sections.
- Typical underground electrical cables include a number of copper or aluminum strands surrounded by a semiconducting or insulating strand shield, a layer of insulation, and an insulation shield. This design of underground cables is known for having a useful life of 25-40 years. In some instances, the life span of an underground cable is shortened when water enters the cable and forms micro-voids in the insulation layer. These micro-voids spread throughout the insulation layer in a tree like shape, collections of which are sometimes referred to as water trees.
- Water trees are known to form in the insulation layer of electrical cables when medium to high voltage alternating current is applied to a polymeric dielectric (insulator) in the presence of water and ions. As water trees grow, they compromise the dielectric properties of the polymer until the insulation layer fails. Many large water trees initiate at the site of an imperfection or a contaminant, but contamination is not a necessary condition for water trees to propagate.
- Water tree growth can be eliminated or retarded by removing or minimizing the water or ions, or by reducing the voltage stress. Another approach requires the injection of dielectric enhancement fluid into interstices located between the strands of the cables. Please see U.S. Pat. No. 5,907,128 for a more detailed description of such an approach. The fluid reacts with water inside the cable and oligomerizes to slow diffusion and provide long lasting dielectric enhancing fluid. The oligomerized fluid functions as a water tree retardant and provides other beneficial properties.
- In accordance with embodiments of the present invention, an apparatus for interconnecting a first cable and a second cable is provided. The first and second cables each comprise an exposed electrically conductive core and an outer insulating layer. The apparatus includes a coupling that electrically interconnects the first and second cables, wherein the coupling defines a first fluid pathway that connects the core of the first cable in fluid communication with the core of the second cable; and at least one internal fluid reservoir disposed in fluid communication with the core of the first or second cable.
- In accordance with another embodiment of the present invention, an apparatus for interconnecting a first cable and a second cable is provided. The first and second cables each comprise an exposed electrically conductive core and an outer insulating layer. The apparatus includes a coupling that electrically interconnects the first and second cables. The coupling defines a first fluid pathway that connects the core of the first cable in fluid communication with the core of the second cable. The apparatus further includes at least one internal fluid reservoir disposed in fluid communication with either core of the first or second cable, and an actuator chamber fluidly isolated from the at least one internal fluid reservoir.
- In accordance with another embodiment of the present invention, an apparatus for interconnecting a first cable and a second cable is provided. The first and second cables each comprise an exposed electrically conductive core and an outer insulating layer. The apparatus includes a housing that defines a sealable interior cavity and a coupling disposed in the interior cavity. The coupling electrically and mechanically interconnects the first and second cables. The coupling defines a first fluid pathway that connects the core of the first cable in fluid communication with the core of the second cable. The apparatus further includes a fluid reservoir disposed in the interior cavity, and means for forcing the contents of the fluid reservoir into the core of the first or second cable.
- The foregoing aspects and many of the attendant advantages of this invention will become more readily appreciated by reference to the following detailed description, when taken in conjunction with the accompanying drawings, wherein:
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FIG. 1 is a perspective, partial cross sectional view of one exemplary embodiment of a cable connector constructed in accordance with aspects of the present invention; -
FIG. 2 is a perspective, partial cross sectional view of one suitable embodiment of an inner connector assembly suitable for use with the outer connector housing shown inFIG. 1 ; -
FIG. 3 is a cross sectional view of the left side of the cable connector shown inFIG. 1 , the right side having a substantially identical configuration; -
FIG. 4 is a perspective, partial cross sectional view of another exemplary embodiment of an inner connector assembly suitable for use with the outer connector housing shown inFIG. 1 ; -
FIG. 5 is a perspective, partial cross sectional view of another exemplary embodiment of an inner connector assembly suitable for use with the outer connector housing shown inFIG. 1 ; -
FIG. 6 is a perspective, partial cross sectional view of another exemplary embodiment of an inner connector assembly suitable for use with the outer connector housing shown inFIG. 1 and showing parts thereof, such as a collar, cut-away for clarity; -
FIG. 7 is a perspective, partial cross sectional view of another exemplary embodiment of an inner connector assembly suitable for use with the outer connector housing shown inFIG. 1 ; and -
FIG. 8 is a perspective, partial cross sectional view of yet another exemplary embodiment of an inner connector assembly suitable for use with the outer connector housing shown inFIG. 1 . - Aspects of the present invention will now be described with reference to the drawings where like numerals correspond to like elements. Embodiments of the present invention are directed to cable connectors, such as cable splice connectors, suitable for interconnecting or splicing together at least two cables or cable sections. More specifically, embodiments of present invention are generally directed to cable connectors that interconnect or splice together at least two cables or cable sections while providing at least one fluid pathway for remediation fluid to flow therebetween. Additionally, some embodiments of the present invention include one or more internal cavities, referred herein as fluid reservoirs, that are capable of storing a selected volume of remediation fluid for subsequent introduction or reintroduction to the cables or cable sections. Although exemplary embodiments of the present invention will be described hereinafter as suitable for interconnecting or splicing electrical power cables or cable sections, it will be appreciated that aspects of the present invention have wide application, and may be suitable for interconnecting other cables or cable sections having an insulation overlayer, such as optical or data transmission cable. Accordingly, the following descriptions and illustrations herein should be considered illustrative in nature, and thus, not limiting the scope of the present invention, as claimed.
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FIG. 1 illustrates a perspective, partial cross sectional view of one exemplary embodiment of acable connector 20 constructed in accordance with aspects of the present invention. Generally described, thecable connector 20 includes aninner connector assembly 24 and anouter connector housing 26. In use, thecable connector 20 securely fastens or splices together at least two cables orcable sections cable connector 20 further protects, and preferably seals off, the connection interface between the cables orcable sections - In one embodiment, the cables or
cable sections conductive core 36 and aninsulation layer 40. The cables orcable sections insulation layer 40 has a generally tubular configuration that extends the length of the cables orcable sections insulation layer 40 is suitably formed from a high molecular weight polyethylene (HMWPE) polymer, a cross-linked polyethylene (XLPE), an ethylene-propylene rubber (EPR) or other solid dielectrics, wherein each may include water tree retardants, fillers, anti-oxidants, UV stabilizers, etc. - The
conductive core 36 is coaxially received within theinsulation layer 40 and is centrally located therein. Theconductive core 36 includes a plurality of electrically conductive stands, although a single strand may also be used. The strands of theconductive core 36 are constructed of a suitable conductive material, such as copper, aluminum, etc. In one embodiment, theconductive core 36 may be surrounded by a semiconductive or insulating strand shield (not shown). The strand shield may be suitably formed from a compound that includes polyethylene or a similar material and surrounds theconductive core 36 such that it is disposed between theconductive core 36 and theinsulation layer 40. - In one embodiment, the cables or
cable sections - Referring to
FIGS. 1-3 , the components of thecable connector 20 will now be described in detail. As described above, one embodiment of thecable connector 20 includes aninner connector assembly 24 and anouter connector housing 26. As best shown inFIGS. 1 and 3 , theouter connector housing 26 defines aninterior cavity 44 for encasing theinner connector assembly 24. At its ends, theouter connector housing 26 includes first andsecond openings interior cavity 44. Theopenings second cable sections interior cavity 44. In one embodiment, theouter connector housing 26 comprises an insulatinglayer 50 that is sandwiched between inner and outersemi-conductive shells - Referring now to
FIGS. 2 and 3 , theinner connector assembly 24 comprises aninner connector housing 58 that houses acable coupling 60 and one or morefluid reservoirs 62 that store remediation fluid. In the embodiment shown, thecable coupling 60 is a tubular structure constructed of an electrically conductive material, such as aluminum, copper, or suitable alloy. Thecable coupling 60 defines anexterior surface 64, ends 68 and 70, and a throughbore 74 that terminates asopenings cable coupling 60, respectively. Theopenings bore 74 are sized and configured for receivingconductive cores 36 of the electrical cables orcable section - When assembled, portions of cables or
cable sections outer insulation layer 40 and other optional layers from the cables or cable sections are inserted intoopenings cores 36 are electrically connected to thecable coupling 60 by direct contact, through the affixing mechanism, such as solder, etc, or other known techniques. As a result, thecore 36 of the first cable orcable section 30 is electrically connected to thecore 36 of the second cable orcable section 32 via thecable coupling 60. - The lengths of the exposed
cores 36 are sufficient to extend into the throughbore 74 atopenings cable coupling 60, when assembled. By extending outside of thecable coupling 60, agap 80 is formed at both ends 68 and 70 of thecable coupling 60 between theinsulation layer 40 of each cable orcable section cable coupling 60. Thecores 36 of the cables orcable sections cable sections cable coupling 60 provides afirst pathway 84 for remediation fluid that is introduced into the cables orcable sections cable section cable section fluid pathway 84. - In one embodiment, the ends of the cables or
cable sections openings cable coupling 60 by crimping eachend cable coupling 60, as known in the art. Crimping guides (not shown) may be provided on theexterior surface 64 of thecable coupling 60 to demark the appropriate location of crimping. Strain relief grooves (not shown) may be located on theexterior surface 64 of thecable coupling 60 adjacent the crimping guides, respectively, and provide relief from strain forces generated as thecable coupling 60 is crimped. Although acable coupling 60 that is crimped around the cores for providing a mechanical and electrical connection therebetween is suitable for embodiments of the present invention, such embodiments of the invention are not intended to be so limited. For example, thecable coupling 60 can be substituted with any mechanical device configured to sufficiently affix the two cable cores in electrical communication while allowing fluidic intercommunication therebetween. - The
inner connector assembly 24 further includes one or more internalfluid reservoirs 62 that are capable of storing remediation fluid, such as CABLECURE®, CABLECURE®/XL, CABLECURE®/SD, CABLECURE®/CB, Acetephenone, etc. In the embodiment shown, theinternal fluid reservoirs 62 are defined by one or more bladders 82. Eachbladder 82 is preferably constructed from a pliable but impermeable material, such as an elastomer, e.g., rubber. As such, eachfluid reservoir 62 may have a selectively adjustable inner volume. Thebladders 82 are disposed in surrounding relation with thegaps 80. In the embodiment shown, thebladders 82 include openings disposed at theirend sections bladders 82 receive therein respective portions of thecable coupling 60 and the cables orcable sections bladders 82 are suitably coupled in a sealed manner at theirend sections cable coupling 60 and the insulation layers 40 of the cables orcable sections end sections bladders 82 are removably affixed to thecable coupling 60 and the cables orcable sections fluid reservoirs 62 defined by thebladders 82 are connected in fluid communication with thegaps 80. Accordingly, fluid injected into the cables orcable sections bladders 82. - In accordance with another aspect of the present invention, the
cable coupling 60 further includes one ormore openings 92 disposed in its side wall, as best shown inFIG. 2 . Theopenings 92 are configured to provide fluid communication with a portion of the through bore 74 from a location external thecable coupling 60. In one embodiment, theopenings 92 are disposed inwardly from the ends of the affixedcores 36 so that theopenings 92 are connected in fluid communication with thefluid pathway 84. When thebladders 82 are affixed to thecable coupling 60, thefluid reservoirs 62 are connected in fluid communication with theopenings 92. As such, thefluid reservoirs 62 are connected in fluid communication with thefluid pathway 84 via theopenings 92. - While the
fluid reservoirs 62 are defined in this embodiment byflexible bladders 82, it will be appreciated that rigid or semi-rigid bladders may also be used. Additionally, it will be appreciated that other expandable and non-expandable structures that define fluid reservoirs may be practiced with embodiments of the present invention. Further, while two bladders were shown and described, it will be appreciated that in some embodiments, one or both of the bladders may be omitted. - The
inner connector assembly 24 further includes aninner connector housing 58 that defines aninterior cavity 104 for encasing the internal components of the assembly, including thecable coupling 60 and thefluid reservoirs 62. In one embodiment, theinterior cavity 104 is oversized so as to create space between the internal components of the assembly and theinner connector housing 58, the benefit of which will be described in detail below. In the embodiment shown, theinner connector housing 58 is assembled from first andsecond end sections 108, 110 and amain body section 114. While a cylindrical housing is shown, other shapes may be practiced with and are considered to be within the scope of the present invention. Theend sections 108, 110 may be removably or non-removably connected to themain body section 114. In one embodiment, theend sections 108, 110 may be removably connected to themain body section 114 through cooperating threaded engagement (not shown); however other known techniques may be used. Theend sections 108 and 110 define aligned openings for introducing the cables orcable sections interior cavity 104. - In the embodiment shown, the
interior cavity 104 is sealed at its ends bycompression seals 116 and 118. Alternatively, thecavity 104 may be sealed by o-rings, compression rings, gaskets, sealing threads or any other suitable seals or sealing means capable of isolating theinterior cavity 104 of theinner connector housing 58 from the environment. The compression seals 116 and 118 rest against innerperipheral shoulder regions 120 defined by themain body section 114 at each end. In one embodiment, the compression seals 116 and 118 are formed by anelastomeric disc 122 sandwiched between twodiscs elastomeric disc 122. - When assembled, the
seals 116 and 118 are concentrically disposed over theinsulation layer 40 of the cables orcable sections end sections 108, 110 press theseals 116 and 118 against theshoulder regions 120 of themain body section 114, thereby compressing theelastomeric discs 122. By compressing theelastomeric discs 122, theelastomeric discs 122 expand outwardly and contact the inner surface of themain body section 114 and the outer surface of theinsulation layer 40 in sealing engagement. - In one embodiment, the remaining space that surrounds the
bladders 82 within theinterior cavity 104 of theinner connector housing 58 may be used to contain pressurized fluid for applying pressure against thebladders 82. As such, the remaining space may be referred to as an actuator chamber. An actuatorchamber access port 130 may be disposed in theinner connector housing 58 for introducing a pressurized fluid, such as gas, into the actuator chamber. In several embodiments, pressures within the actuator chamber are contemplated to be approximately 3-10 psi. - Although chamber pressures within the range of 3-10 psi are described in one embodiment, it should be apparent that the embodiments of the present invention are not intended to be so limited. As a non-limiting example, high chamber pressures are also within the scope of the present invention. Therefore, pressure ranges cited herein are intended to be non-limiting examples, and as such, a wide range of chamber pressures are within the scope of the present invention. It will be appreciated that the actuator
chamber access port 130 may be fitted with asuitable valving mechanism 134, such as a poppet valve, for providing selective access to the actuator chamber. - It will be appreciated that the shape of the
bladders 82 are determined by the amount of fluid it contains and the pressure that is applied thereto. While the preferred embodiment utilizes compressed gas as the force generator, polymeric bushings, compression springs or the like could be used to pressurize the remediation fluid contained in thebladders 82 by applying force against thebladders 82 or through an intermediary device, such as a piston, to more evenly distribute the force. Such a force generator would not require the actuator chamber access port. - Still referring to
FIG. 2 , theinner connector housing 58 is electrically connected to thecable coupling 60 for maintaining theinner connector housing 58 at the same voltage potential as thecable coupling 60. In the embodiment shown, an electricallyconductive member 140, such as a metallic bolt or spring, contacts thecable coupling 60 and a portion of theinner connector housing 58. - In operation, remediation fluid is pumped or otherwise injected into the cables or
cable sections cable connector 20. As the remediation fluid passes through the cables orcables sections cable sections cores 36 and fills thefluid reservoirs 62 defined by thebladders 82. The pumping process continues until additional remediation fluid is pumped into thecable connector 20 to fill thefluid reservoirs 62 of thebladder 82. Doing so provides thebladders 82 with additional remediation fluid which, over a period of time, is introduced or forced into the cables orcable sections electrical connector 20 andcable 40 have been filled with remediation fluid, the remediation fluid begins to diffuse into the cable insulation. As fluid is depleted in the cables orcable sections fluid reservoirs 62. - In embodiments where the actuator chamber is pressurized, compressed gas may be selectively injected into the actuator chamber through the
access port 130 prior to fluid injection. During use, the pressurized fluid contained within the actuator chamber applies pressure against thebladders 82, which in turn, applies pressure to the fluid occupying thefluid reservoirs 62. It will be appreciated that the pressure exerted against thebladders 82 aids in driving the fluid from thebladders 82 into the cable orcable sections -
FIG. 4 illustrates another exemplary embodiment of aninner connector assembly 224 constructed in accordance with aspects of the present invention for use with theouter connector housing 26 ofFIG. 1 . Theinner connector assembly 224 is substantially similar in materials, construction, and operation as theinner connector assembly 24 ofFIG. 1 , except for the differences that will now be described. In this embodiment, asingle bladder 282 that defines afluid reservoir 262 is utilized. Thebladder 282 extends from theinsulation layer 240 of the first cable orcable section 230 to theinsulation layer 240 of the second cable orcable section 232, thereby covering thegaps 280 formed by the exposedcores 236 of the first and second cable orcable sections - The
bladder 282 is preferably constructed of a semi-conductive elastomeric material. When assembled, thebladder 282 is electrically connected to theinner assembly housing 258. In the embodiment shown, an electricallyconductive member 228 electrically connects thebladder 282 to a portion of theinner assembly housing 258. In the embodiment shown, aconductive adapter 296 is provided that electrically links the exposedcore 236 to thebladder 282. Theadapter 296 contacts and is retained against the exposedcore 236 of the second cable orcable section 232 by a band clamp. Theadapter 296 further contacts and is retained against the inner surface of one end section of thebladder 282 by aband clamp 290. -
FIG. 5 illustrates another exemplary embodiment of aninner connector assembly 324 constructed in accordance with aspects of the present invention for use with theouter connector housing 26 ofFIG. 1 . Theinner connector assembly 324 is substantially similar in materials, construction, and operation as theinner connector assembly 24 ofFIG. 1 , except for the differences that will now be described. In this embodiment, the bladders are omitted and in their stead are onestationary piston 366 and onemovable piston 372 that define three fluidtight chambers 394A-394C. The first andthird chambers gaps 380 formed by the exposed cores of the cables orcable sections third chambers second chamber 394B, located in between the first andthird chambers pistons hollow sleeve 398, which is concentrically disposed over thecoupling 360. - The
hollow sleeve 398 defines a constant outer diameter. Thestationary piston 366 is fixedly coupled at one end of thesleeve 398 by techniques known in the art, such as welding, mechanical fasteners, etc. while themovable piston 372 is slidably coupled in a sealing manner to thesleeve 398. At the end of thesleeve 398 opposite thestationary piston 366, astopper ring 338 is fixedly attached thereto for providing an end stop for themovable piston 372. In use, themovable piston 372 is capable of sliding between thestationary piston 366 and thestopper ring 338. Thepistons sleeve 398 at their inner circumferential surface as well as sealingly engage the inner surface of theinner assembly housing 358. Accordingly, eachchamber 394A-394C is fluidly isolated from one another. - In one embodiment, the inner bore of the
sleeve 398 is sized and configured to provide space between the inner surface of the sleeve bore and theouter surface 364 of thecoupling 360. In this embodiment, the space created between the coupling and the sleeve forms a second fluid pathway. Alternatively, the inner bore of thesleeve 398 may be sized and configured to slidably contact theouter surface 364 of thecoupling 360. - While a
sleeve 398 has been proved in the illustrative embodiment, it will be appreciated that thesleeve 398 may be replaced by configuring theexterior surface 364 of thecable coupling 360 with a constant diameter. - The
stationary piston 366 may further include anaccess port 342. Theaccess port 342 provides access to the second,actuator chamber 394B for supplying pressurized gas thereto. Themovable piston 372 further includescontact protrusions 328 positioned at the inner and outer peripheries of thepiston 372 such that theprotrusions 328 remain in contact with thesleeve 398 and theinner connector housing 358 during use. Thepiston 372 is preferably constructed of a conductive or semiconductive material so that theinner connector housing 358 is electrically connected to thesleeve 398. In embodiments where a space is formed between thesleeve 398 and thecable coupling 360, a conductive link may be provided for electrically connecting thecoupling 360 with thesleeve 398. -
FIG. 6 illustrates another exemplary embodiment of aninner connector assembly 424 constructed in accordance with aspects of the present invention for use with theouter connector housing 26 ofFIG. 1 . Theinner connector assembly 424 is substantially similar in materials, construction, and operation as theinner connector assembly 324 ofFIG. 5 , except for the differences that will now be described. In this embodiment, the stationary piston is permitted to move, and is hereinafter referred to asmovable piston 466. Themovable pistons tight chambers 494A-494C. The first andthird chambers gaps 480 formed by the exposedcores 436 of the cables orcable sections third chambers second chamber 494B, located in between the first andthird chambers - Pairs of stopper rings 438 are fitted at the ends of the
sleeve 498 and in the center region of thesleeve 498 for providing end stops for themovable pistons pistons pistons sleeve 498 at its inner circumferential surface and sealingly engages the inner surface of theinner assembly housing 458. Accordingly, each chamber is fluidly isolated from one another. Theinner connector housing 458 further includes an actuatorchamber access port 434 for providing access to the actuator chamber. It will be appreciated that the actuatorchamber access port 434 may be fitted with asuitable valving mechanism 456, such as a poppet valve, for providing selective access to the actuator chamber. In use, pressurized fluid introduced and stored within the actuator chamber exerts pressure on thefluid chambers movable pistons cable sections - While the preferred embodiments utilize compressed gas as the force generator, polymeric bushings, compression springs or the like could be used to pressurize the remediation fluid contained in the
fluid chambers -
FIG. 7 illustrates another exemplary embodiment of aninner connector assembly 524 constructed in accordance with aspects of the present invention for use with theouter connector housing 26 ofFIG. 1 . Theinner connector assembly 524 of the present embodiment is intended to be used in a substantially vertical orientation. However, it should be apparent to one of ordinary skill that theinner connector assembly 524 is not intended to be so limited. As non-limiting examples, theinner connector assembly 524 may be positioned in a substantially horizontal, oblique, or obtuse angular orientation. Such embodiments are also within the scope of the present invention. - The
inner connector assembly 524 is substantially similar in materials, construction, and operation as theinner connector assembly 24 ofFIG. 1 , except for the differences that will now be described. As best shown inFIG. 7 , the bladders ofFIG. 1 are replaced by an elongatedhollow sleeve 598 disposed in concentric relation with thecable coupling 560. One end of thesleeve 598 covers theinsulation layer 540 of either the first or second cable orcable section sleeve 598 extends from theinsulation layer 540 of one cable orcable section coupling 560. - The end of the
sleeve 598 is sealingly engaged with theinsulation layer 540. In one embodiment, the inner surface of the sleeve bore may include one or more peripheral grooves for receiving seals, such as o-rings, to create a sealing interface between theinsulation layer 540 and the inner surface of thesleeve 598. Alternatively, the sealing connection may be achieved by heat bonding, adhesives, heat shrinking seals, or clamp rings, just to name a few. - The inner bore of the
sleeve 598 is sized so as to define afluid passageway 552 in-between the inner bore surface of thesleeve 598 and theouter surface 564 of thecoupling 560. The outer surface of thesleeve 598 is sized so that space is provided for defining a fluid reservoir between the outer surface of thesleeve 598 and theinner connector housing 558. Thesleeve 598 is electrically connected to theinner connector housing 558 byconductive link 528. Thesleeve 598 may be electrically connected to thecoupling 560 or the cores of the first or second cable orcable section inner connector housing 558 may remain at the same voltage potential as thecoupling 560. -
FIG. 8 illustrates another exemplary embodiment of aninner connector assembly 624 constructed in accordance with aspects of the present invention, which is suitable for use with theouter connector housing 26 ofFIG. 1 . Theinner connector assembly 624 is substantially similar in materials, construction, and operation as theinner connector assembly 24 ofFIG. 1 , except for the differences that will now be described. In this embodiment, theinner connector housing 658 defines aninterior cavity 659 for encasing the internal components of the assembly, including thecable coupling 660 and anelastic bladder 682. In one embodiment, theinterior cavity 659 is oversized so as to create space between the internal components of the assembly and theinner connector housing 658. In use, as will be described in detail below, this space is filled with remediation fluid, and thus, may be referred to as a fluid reservoir. - When assembled, the
bladder 682 is disposed within theinterior cavity 659 of theinner connector housing 658 and extends along a portion of thecable coupling 660. In one embodiment, the bladder is disposed in surrounding relation with thecable coupling 660 and extends from the insulation layer ofcable 630 to the insulation layer ofcable 632. In this embodiment, thebladder 682 is preferably not sealed at its ends to the insulation layer 640 of the cable orcable sections gaps 680 and the fluid reservoir defined by the interior cavity. Thebladder 682 defines an interior chamber that in one embodiment my contain a gas under pressure, as will be described in detail below. In one embodiment, thebladder 682 has a U-shaped cross section for providing appropriate fluid flow between thegaps 680 and the fluid reservoir, while further providing space for an electricallyconductive member 628, such as a metallic bolt or spring, to electrically link thecable coupling 660 with theinner connector housing 658. Alternatively, to electrically link theinner connector housing 658 and thecable coupling 660 for maintaining theinner connector housing 658 at the same voltage potential as thecable coupling 660, thebladder 682 may be constructed of a conductive or semi-conductive material and may be configured and arranged to suitably interconnect thecable coupling 660 and theinner connector housing 658 in electrical communication. It will be appreciated that in such an embodiment, thebladder 682 can have cross-sectional shapes other than U-shaped. - In one embodiment, an
interior chamber 685 defined by thebladder 682 may contain or be filled with gas under pressure, and may be referred to as an actuator chamber. To that end, thebladder 682 includes a valved inlet (not shown but well known in the art) for selectively accessing theinterior chamber 685 of thebladder 682. In embodiments of the present invention, thebladder 682 may be filled with pressurized gas prior to assembly, or may be filled after assembly of theinner connector housing 658 through avalve 687, such as a poppet valve, located in theinner connector housing 658. A fluid passageway is provided that interconnects the valve and the interior chamber of thebladder 682 in fluid communication. In either case, it is preferable to fill theinterior chamber 685 of thebladder 682 with pressurized gas prior to the introduction of remediation fluid into the cable orcable sections interior chamber 685 is initially pressurized to approximately 5 psi, although other pressures may be practiced with the present invention, and thus, are within the scope of the present invention. - Prior to use, the
inner connector housing 658 is assembled in a fluid tight manner and thebladder 682 can be optionally filled with pressurized gas. Fluid is then injected into the cables orcable sections inner connector housing 658. As the remediation fluid passes through the cables orcables sections cable sections gaps 680 and fills the fluid reservoir. - In embodiments where the
bladder 682 is filled with pressurized gas, the fluid injected into the cables orcable sections cable sections interior chamber 685. As the fluid is injected into the cables orcable sections cable sections gaps 680. While fluid occupies the fluid reservoir, the fluid exerts pressure against thebladder 682, thereby compressing thebladder 682 into a smaller volume. By compressing thebladder 682 into a smaller volume, the volume or fluid capacity of the fluid reservoir increases. This decrease in the volume of the bladderinterior chamber 685 increases the internal pressure of the pressurized gas contained therein. This process continues until an equilibrium between the fluid pressure in the fluid reservoir and the pressurized gas within thebladder 682 is reached. - During use, the remediation fluid stored in the fluid reservoir is introduced over a period of time into the cables or
cable sections interior chamber 685 is filled with pressurized gas, the pressurized gas contained within theinterior chamber 685 applies pressure against the fluid contained in the fluid reservoir and imparts a driving force against the fluid to force the fluid from the fluid reservoir into the cable orcable sections - The principles, preferred embodiments, and modes of operation of the present invention have been described in the foregoing description. However, the invention which is intended to be protected is not to be construed as limited to the particular embodiments disclosed. Further, the embodiments described herein are to be regarded as illustrative rather than restrictive. Variations and changes may be made by others, and equivalents employed, without departing from the spirit of the present invention. Accordingly, it is expressly intended that all such variations, changes, and equivalents which fall within the spirit and scope of the present invention.
Claims (30)
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/110,024 US20060231283A1 (en) | 2005-04-19 | 2005-04-19 | Cable connector having fluid reservoir |
PCT/US2006/014347 WO2006113591A2 (en) | 2005-04-19 | 2006-04-17 | Cable connector having fluid reservoir |
CA2604945A CA2604945C (en) | 2005-04-19 | 2006-04-17 | Cable connector having fluid reservoir |
CN2006800133191A CN101208832B (en) | 2005-04-19 | 2006-04-17 | Cable connector having fluid reservoir |
KR1020077025389A KR100940509B1 (en) | 2005-04-19 | 2006-04-17 | Cable connector having fluid reservoir |
DE112006000974T DE112006000974B4 (en) | 2005-04-19 | 2006-04-17 | Cable connector with fluid reservoir |
TW095113766A TWI323540B (en) | 2005-04-19 | 2006-04-18 | Cable connector having fluid reservoir |
US12/481,431 US7723611B2 (en) | 2005-04-19 | 2009-06-09 | Cable connector having fluid reservoir |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US11/110,024 US20060231283A1 (en) | 2005-04-19 | 2005-04-19 | Cable connector having fluid reservoir |
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US12/481,431 Continuation US7723611B2 (en) | 2005-04-19 | 2009-06-09 | Cable connector having fluid reservoir |
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US20060231283A1 true US20060231283A1 (en) | 2006-10-19 |
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ID=37107383
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US11/110,024 Abandoned US20060231283A1 (en) | 2005-04-19 | 2005-04-19 | Cable connector having fluid reservoir |
US12/481,431 Expired - Fee Related US7723611B2 (en) | 2005-04-19 | 2009-06-09 | Cable connector having fluid reservoir |
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US12/481,431 Expired - Fee Related US7723611B2 (en) | 2005-04-19 | 2009-06-09 | Cable connector having fluid reservoir |
Country Status (7)
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---|---|
US (2) | US20060231283A1 (en) |
KR (1) | KR100940509B1 (en) |
CN (1) | CN101208832B (en) |
CA (1) | CA2604945C (en) |
DE (1) | DE112006000974B4 (en) |
TW (1) | TWI323540B (en) |
WO (1) | WO2006113591A2 (en) |
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US20100059275A1 (en) * | 2008-08-20 | 2010-03-11 | Utilx Corporation | Cable splice connection assembly |
US20120085564A1 (en) * | 2010-10-08 | 2012-04-12 | D Angelo Iii Charles | Hydroformed splice for insulated conductors |
US8816203B2 (en) | 2009-10-09 | 2014-08-26 | Shell Oil Company | Compacted coupling joint for coupling insulated conductors |
US8859942B2 (en) | 2010-04-09 | 2014-10-14 | Shell Oil Company | Insulating blocks and methods for installation in insulated conductor heaters |
US8857051B2 (en) | 2010-10-08 | 2014-10-14 | Shell Oil Company | System and method for coupling lead-in conductor to insulated conductor |
US8943686B2 (en) | 2010-10-08 | 2015-02-03 | Shell Oil Company | Compaction of electrical insulation for joining insulated conductors |
US9048653B2 (en) | 2011-04-08 | 2015-06-02 | Shell Oil Company | Systems for joining insulated conductors |
US9080409B2 (en) | 2011-10-07 | 2015-07-14 | Shell Oil Company | Integral splice for insulated conductors |
US9226341B2 (en) | 2011-10-07 | 2015-12-29 | Shell Oil Company | Forming insulated conductors using a final reduction step after heat treating |
US9466896B2 (en) | 2009-10-09 | 2016-10-11 | Shell Oil Company | Parallelogram coupling joint for coupling insulated conductors |
CN106711918A (en) * | 2016-11-30 | 2017-05-24 | 广东安诺新材料科技有限公司 | Double protection cable intermediate joint safety box provided with inner container and fully filled with fireproofing mud |
CN106711919A (en) * | 2016-11-30 | 2017-05-24 | 广东安诺新材料科技有限公司 | Anti-explosion fire extinguishing apparatus for 56-500kV high-voltage cable joints |
CN106786331A (en) * | 2016-11-30 | 2017-05-31 | 广东安诺新材料科技有限公司 | A kind of armored cassette for transparent cable intermediate joint |
CN106786329A (en) * | 2016-11-30 | 2017-05-31 | 广东安诺新材料科技有限公司 | A kind of fire-proof and explosion-proof protection device of high-voltage cable middle joint |
US20210143626A1 (en) * | 2019-11-12 | 2021-05-13 | Leia B.V. | Cable Joint Assembly |
US11600983B2 (en) | 2020-04-14 | 2023-03-07 | Siemens Gamesa Renewable Energy A/S | Interface, method and system for connecting electrical elements |
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Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
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US8344252B2 (en) * | 2008-08-20 | 2013-01-01 | Utilx Corporation | Cable splice connection assembly |
US20100059275A1 (en) * | 2008-08-20 | 2010-03-11 | Utilx Corporation | Cable splice connection assembly |
US9466896B2 (en) | 2009-10-09 | 2016-10-11 | Shell Oil Company | Parallelogram coupling joint for coupling insulated conductors |
US8816203B2 (en) | 2009-10-09 | 2014-08-26 | Shell Oil Company | Compacted coupling joint for coupling insulated conductors |
US8859942B2 (en) | 2010-04-09 | 2014-10-14 | Shell Oil Company | Insulating blocks and methods for installation in insulated conductor heaters |
US20120085564A1 (en) * | 2010-10-08 | 2012-04-12 | D Angelo Iii Charles | Hydroformed splice for insulated conductors |
US8586866B2 (en) * | 2010-10-08 | 2013-11-19 | Shell Oil Company | Hydroformed splice for insulated conductors |
US8732946B2 (en) | 2010-10-08 | 2014-05-27 | Shell Oil Company | Mechanical compaction of insulator for insulated conductor splices |
US8857051B2 (en) | 2010-10-08 | 2014-10-14 | Shell Oil Company | System and method for coupling lead-in conductor to insulated conductor |
US8943686B2 (en) | 2010-10-08 | 2015-02-03 | Shell Oil Company | Compaction of electrical insulation for joining insulated conductors |
US9755415B2 (en) | 2010-10-08 | 2017-09-05 | Shell Oil Company | End termination for three-phase insulated conductors |
US9048653B2 (en) | 2011-04-08 | 2015-06-02 | Shell Oil Company | Systems for joining insulated conductors |
US9080409B2 (en) | 2011-10-07 | 2015-07-14 | Shell Oil Company | Integral splice for insulated conductors |
US9226341B2 (en) | 2011-10-07 | 2015-12-29 | Shell Oil Company | Forming insulated conductors using a final reduction step after heat treating |
CN106711918A (en) * | 2016-11-30 | 2017-05-24 | 广东安诺新材料科技有限公司 | Double protection cable intermediate joint safety box provided with inner container and fully filled with fireproofing mud |
CN106711919A (en) * | 2016-11-30 | 2017-05-24 | 广东安诺新材料科技有限公司 | Anti-explosion fire extinguishing apparatus for 56-500kV high-voltage cable joints |
CN106786331A (en) * | 2016-11-30 | 2017-05-31 | 广东安诺新材料科技有限公司 | A kind of armored cassette for transparent cable intermediate joint |
CN106786329A (en) * | 2016-11-30 | 2017-05-31 | 广东安诺新材料科技有限公司 | A kind of fire-proof and explosion-proof protection device of high-voltage cable middle joint |
US20210143626A1 (en) * | 2019-11-12 | 2021-05-13 | Leia B.V. | Cable Joint Assembly |
US11502496B2 (en) * | 2019-11-12 | 2022-11-15 | Leia B.V. | Cable joint assembly |
US11600983B2 (en) | 2020-04-14 | 2023-03-07 | Siemens Gamesa Renewable Energy A/S | Interface, method and system for connecting electrical elements |
Also Published As
Publication number | Publication date |
---|---|
TWI323540B (en) | 2010-04-11 |
KR100940509B1 (en) | 2010-02-10 |
CN101208832A (en) | 2008-06-25 |
KR20070112305A (en) | 2007-11-22 |
WO2006113591A3 (en) | 2007-12-21 |
US7723611B2 (en) | 2010-05-25 |
CA2604945C (en) | 2010-11-23 |
CN101208832B (en) | 2011-12-14 |
US20090246995A1 (en) | 2009-10-01 |
DE112006000974B4 (en) | 2013-10-24 |
TW200638648A (en) | 2006-11-01 |
WO2006113591A2 (en) | 2006-10-26 |
DE112006000974T5 (en) | 2008-02-28 |
CA2604945A1 (en) | 2006-10-26 |
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