WO2006124409A2 - Appareil et procede de connexion de cable - Google Patents

Appareil et procede de connexion de cable Download PDF

Info

Publication number
WO2006124409A2
WO2006124409A2 PCT/US2006/017898 US2006017898W WO2006124409A2 WO 2006124409 A2 WO2006124409 A2 WO 2006124409A2 US 2006017898 W US2006017898 W US 2006017898W WO 2006124409 A2 WO2006124409 A2 WO 2006124409A2
Authority
WO
WIPO (PCT)
Prior art keywords
cable
gland
barrel
conductor
sealing
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/US2006/017898
Other languages
English (en)
Other versions
WO2006124409A3 (fr
Inventor
Guanjun Cai
Stuart Weir
Jeff Babcock
Hélèn RAYMOND
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chemelex LLC
Original Assignee
Tyco Thermal Controls LLC
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
Application filed by Tyco Thermal Controls LLC filed Critical Tyco Thermal Controls LLC
Publication of WO2006124409A2 publication Critical patent/WO2006124409A2/fr
Publication of WO2006124409A3 publication Critical patent/WO2006124409A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H01R4/10—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/20—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping using a crimping sleeve
    • 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
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/527—Flameproof cases
    • 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
    • H01R4/70—Insulation of connections

Definitions

  • the invention relates to connecting cables, and in particular, to an apparatus for joining electrical cables.
  • Ml cables are typically used in electricity transportation and electric heat tracing applications.
  • Ml cables typically include at least one inner conductor surrounded by a mineral-based insulation layer, such as magnesium oxide (MgO) powder insulation.
  • the insulation layer is surrounded by an outer sheath composed of a metal material, such as copper.
  • Ml cable The above components of the Ml cable are all produced together by series drawing, as is well known in the art. Due to the nature of the production process, the length of the Ml cable which may be produced is limited. Accordingly, lengths of Ml cable frequently require connection to each other in the field. As Ml cables are used in environments where high temperature or an aggressive medium may be present, it is desirable for Ml cables to be fire-resistant. Consequently, it is preferred that any connections between two lengths of Ml cable also be fire-resistant. [0004] Prior art field connections for Ml cables include a crimp-on splice connector to connect the two ends of the conductors.
  • a plastic material such as a tape and/or a PVC sleeve as a sealing insulation.
  • a plastic material such as a tape and/or a PVC sleeve as a sealing insulation.
  • the disadvantage of this prior art field connection is that it is not fire resistant due to the of the plastic tape and/or sleeve.
  • Another type of prior art Ml cable connection may be made in a plant by welding the two ends of the Ml cable. Such cable connections may be fire resistant, but have the disadvantage significant labor time and cost. [0006] Accordingly, there is a need for a cable connection apparatus which may facilitate the joining of two lengths of cable in the field and provides a fire resistant connection.
  • an apparatus for connecting a first cable to a second cable is provided.
  • Each of the first and second cables has at least one conductor, an insulating layer surrounding the conductor, and an outer sheath surrounding the insulating layer.
  • the conductor of each cable has an exposed end portion.
  • the apparatus comprises: a) a barrel defining a first open end and a second open end, the barrel defining a channel therethrough, the channel communicating with the first and second ends, wherein the channel is adapted to receive a portion of the first cable and a portion of the second cable; b) a connector adapted to electrically connect the conductor of the first cable to the conductor of the second cable; c) a fire-resistant insulation located in the channel, the insulation substantially surrounding at least the connector and the exposed end portion of the conductors of the first and second cables; and d) a sealing means for sealing the first cable to the first end of the barrel.
  • Each of the first and second cables has at least one conductor, an insulating layer surrounding the conductor, and an outer sheath surrounding the insulating layer.
  • the conductor of each cable has an exposed end portion.
  • the apparatus comprises: a) a barrel defining a first open end and a second open end, the barrel defining a channel therethrough, the channel communicating with the first and second ends, wherein the channel is adapted to receive a portion of the first cable and a portion of the second cable; b) a connector adapted to electrically connect the conductor of the first cable to the conductor of the second cable; c) a fire-resistant insulation located in the channel, the insulation substantially surrounding at least the connector and the exposed end portion of the conductors of the first and second cables; d) a first sealing means for sealing the first cable to the first end of the barrel; and e) a second sealing means for sealing the second cable to the second end of the barrel.
  • a method of connecting a first cable to a second cable is provided.
  • Each of the first and second cables has at least one conductor, an insulating layer surrounding the conductor, and an outer sheath surrounding the insulating layer.
  • the method comprises: a) sliding a barrel on to the first cable; b) sliding an insulating spacer on to the end portion of the conductor and securing the spacer to the insulating layer; c) repeating step (b) for the second cable; d) electrically connecting the conductors of the first and second cable; e) placing a fire-resistant insulation over exposed end portions of the conductors of the first and second cables and over the ceramic spacers connected to the first and second cable; f) sliding the barrel over the end portions of the conductors and the insulating spacers of the first and second cables; and g) sealing the barrel to the first and second cables.
  • Figure 1 is a cross-sectional view showing two lengths of Ml cable joined by a preferred embodiment of the cable connection apparatus according to the present invention.
  • Figure 2 is an exploded perspective view of one half of the embodiment shown in Fig. 1 , with the other half being identical.
  • Figures 1 and 2 show a cable connection apparatus 10 according to a preferred embodiment of the present invention, which may be used to connect a first cable 12a to a second cable 12b.
  • the first and second cables 12a, 12b are two lengths of the same type of cable.
  • each cable 12a, 12b includes a corresponding conductor 14a, 14b which is surrounded by an insulating layer 16a, 16b, respectively.
  • the insulating layers 16a, 16b of each cable 12a, 12b are surrounded by an outer sheath 18a, 18b, which is preferably made of a metal material, such as copper.
  • the insulating layers 16a, 16b are preferably composed of a mineral insulation, such as magnesium oxide.
  • connection apparatus [0013] Continuing to refer to Figures 1 and 2, the connection apparatus
  • the apparatus 10 includes first and second sealing means 19a, 19b for sealing the first and second cables 12a, 12b to a barrel 34 which is fitted over the cable joint.
  • the first and second sealing means 19a, 19b comprise first and second nuts 20a, 20b, first and second sliding ferrules 22a, 22b, and first and second glands 24a, 24b, respectively.
  • the first and second nuts 20a, 20b, first and second sliding ferrules 22a, 22b, and the first and second glands 24a, 24b fit onto the first and second cables 12a, 12b, respectively.
  • the apparatus 10 may also include first and second insulating spacers 26a, 26b which fit over corresponding exposed portions 28a, 28b of conductors 14a, 14b.
  • the insulating spacers 26a, 26b are made from a ceramic material.
  • a connector 30 is provided to electrically connect the conductors
  • the connector 30 is a crimp-on splice connector.
  • Fire-resistant insulation 32 is wrapped around the joined exposed portions 28a, 28b of conductors 14a, 14b, the connector 30, as well as adjacent portions of first and second cables 12a, 12b.
  • the fire-resistant insulation 32 is a ceramic filling or a fire-rated fiber.
  • the cable joint surrounded by the fire-resistant insulation 32 is received in a channel 37 in the barrel 34.
  • the channel 37 extends between opposing first and second open ends 36a, 36b of the barrel 34.
  • the first gland 24a is connected to the first open end 36a and the second gland 24b is connected to the second open end 36b of the barrel 34.
  • the first and second glands 24a, 24b are connected to the barrel 34 by screwing first and second outer threaded portions 38a, 38b of the glands 24a, 24b, respectively, to corresponding inner threaded portions 40a, 40b of the barrel 34.
  • the outer threaded portions 38a, 38b and the inner threaded portions 40a, 40b of the barrel 34 are dry seal threaded connections.
  • the nuts 20a, 20b, sealing ferrules 22a, 22b, glands 24a, 24b and the barrel 34 are all made from a metal material which is suitable for meeting the performance requirements for the connection.
  • the foregoing components may be made of copper.
  • the outer sheath 18a, 18b and insulating layer 16a, 16b are peeled from the end of cables 12a, 12b, respectively, to create the exposed end portions 28a, 28b of the conductors 14a, 14b.
  • Nuts 20a, 20b, sealing ferrules 22a, 22b, and glands 24a, 24b are then slid on to corresponding first and second cables 12a, 12b.
  • Insulating spacers 26a, 26b are then fitted on to the exposed portions 28a, 28b of conductors 14a, 14b and secured to the insulating layer 16a, 16b of corresponding cables 12a, 12b.
  • the barrel 34 is then fitted on to one of the cables 12a or 12b.
  • the connector 30 is crimped-on to the exposed portions 28a, 28b of the conductors 14a, 14b using hydraulic tool.
  • the tool has crimp dies which deform the crimp-on connector 30 to crimp and hold the conductors.
  • the fire-resistant insulation 32 is wrapped around portions of the first and second cable 12a, 12b, and all other components located in the channel 37 of the barrel 34, such as the exposed portions of the conductor 28a, 28b, connector 30, and insulating spacers 26a, 26b. In this manner, the fire-resistant insulation 32 secures the insulating spacers in position.
  • the barrel 34 is then moved into position and substantially centered over the connector 30 to cover the fire-resistant insulation 32.
  • the first gland 24a is then screwed into the inner threaded portion 40a of the first end 36a of the barrel 34 to seal the first gland to the barrel.
  • the first nut 22a is then tightened by screwing it to the other end of gland 24a thereby pushing the first sealing ferrule 22a into engagement with the first gland 24a to seal the first gland 24a to first cable 12a.
  • the second gland 24b and second nut 22b are then tightened in the same manner to seal the second gland 24b against the barrel 34 and the second cable 12b.
  • the method and apparatus of the present invention provides the advantage of a fire resistant cable joint which can be assembled in the field and which is sealed to keep out aggressive media which may be present in places where the cable is installed.

Landscapes

  • Cable Accessories (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)

Abstract

La présente invention concerne un appareil pour connecter un premier câble à un second câble. L'appareil comprend un fût définissant deux extrémités ouvertes communiquant via un canal recevant une partie de chacun des deux câbles. Un connecteur relie électriquement les conducteurs des deux câbles. L'isolation entoure au moins le connecteur et la partie d'extrémité dégagée du conducteur de chaque câble, un joint complétant l'étanchéité avec l'extrémité correspondante du fût.
PCT/US2006/017898 2005-05-11 2006-05-09 Appareil et procede de connexion de cable Ceased WO2006124409A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA2,507,103 2005-05-11
CA002507103A CA2507103A1 (fr) 2005-05-11 2005-05-11 Appareil et methode de connexion de cable

Publications (2)

Publication Number Publication Date
WO2006124409A2 true WO2006124409A2 (fr) 2006-11-23
WO2006124409A3 WO2006124409A3 (fr) 2007-01-04

Family

ID=37431826

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2006/017898 Ceased WO2006124409A2 (fr) 2005-05-11 2006-05-09 Appareil et procede de connexion de cable

Country Status (2)

Country Link
CA (1) CA2507103A1 (fr)
WO (1) WO2006124409A2 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2469487A (en) * 2009-04-15 2010-10-20 Tyco Electronics Ltd Uk Coaxial cable connector
EP2054975A4 (fr) * 2006-07-28 2011-03-23 Quick Connectors Inc Connecteur électrique pour des fils conducteurs enfermés dans une gaine tubulaire de protection
EP2506375A3 (fr) * 2011-03-29 2013-12-04 Zellner GmbH Fixation étanche résistante à la traction pour objets ronds oblongs
US20180241190A1 (en) * 2014-10-03 2018-08-23 Nexans Fire-resistant cable connection
EP4165741A1 (fr) * 2020-06-15 2023-04-19 Chromalox, Inc. Raccord permettant de recevoir un fil isolé et son procédé d'assemblage

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2938940A (en) * 1958-04-16 1960-05-31 Roy A Calendine Cable splicing sleeve
US3609639A (en) * 1969-06-30 1971-09-28 Us Elevator Corp Underwater electrical connector apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2054975A4 (fr) * 2006-07-28 2011-03-23 Quick Connectors Inc Connecteur électrique pour des fils conducteurs enfermés dans une gaine tubulaire de protection
GB2469487A (en) * 2009-04-15 2010-10-20 Tyco Electronics Ltd Uk Coaxial cable connector
GB2469487B (en) * 2009-04-15 2012-08-15 Tyco Electronics Ltd Uk Coaxial cable connector and associated method
US8932079B2 (en) 2009-04-15 2015-01-13 Tyco Electronics Uk Ltd Coaxial connector and method of assembling one
EP2506375A3 (fr) * 2011-03-29 2013-12-04 Zellner GmbH Fixation étanche résistante à la traction pour objets ronds oblongs
US20180241190A1 (en) * 2014-10-03 2018-08-23 Nexans Fire-resistant cable connection
EP4165741A1 (fr) * 2020-06-15 2023-04-19 Chromalox, Inc. Raccord permettant de recevoir un fil isolé et son procédé d'assemblage

Also Published As

Publication number Publication date
CA2507103A1 (fr) 2006-11-11
WO2006124409A3 (fr) 2007-01-04

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