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WO1996036975A1 - Procede et dispositif d'isolation de cables aeriens - Google Patents

Procede et dispositif d'isolation de cables aeriens Download PDF

Info

Publication number
WO1996036975A1
WO1996036975A1 PCT/SE1996/000640 SE9600640W WO9636975A1 WO 1996036975 A1 WO1996036975 A1 WO 1996036975A1 SE 9600640 W SE9600640 W SE 9600640W WO 9636975 A1 WO9636975 A1 WO 9636975A1
Authority
WO
WIPO (PCT)
Prior art keywords
cable
band
carriage
plastic
cables
Prior art date
Application number
PCT/SE1996/000640
Other languages
English (en)
Inventor
Nils Karlsson
Evert Hellquist
Original Assignee
Nils Karlsson
Evert Hellquist
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 Nils Karlsson, Evert Hellquist filed Critical Nils Karlsson
Publication of WO1996036975A1 publication Critical patent/WO1996036975A1/fr
Priority to NO975258A priority Critical patent/NO975258D0/no

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
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables

Definitions

  • Electric overhead cables which are drawn through forests suffer from the fact that the cut outs made for that purpose, so called cable lanes, grow over too quickly. This results in disturbances in the distribution of electricity when the trees or their branches are bent down by snow and ice to contact the cables.
  • the problem can principally be solved by using insulated cables but it is very expensive to replace the many and long existing cables with cables of that kind.
  • This invention provides a method and a device for insulating overhead cables on the spot by enclosing them with an insulating plastic covering. It is mainly characterized by a carriage which is movable on the cable and which includes means for successively laying a plastic band onto the cable, a heating element for heating the edges of the band and a clamping device for continuously pressing together and welding the heated band edges while enclosing the cable.
  • the carriage includes a funnel element and a knife for producing the band from a plastic hose which is fed through the funnel element and cut open by the knife.
  • a carriage having a reversed U-shaped section is built-up by two parallel frames 1 which are mutually connected by five transverse beams 3, 4, 5, 6, 7.
  • the distance between the frames is only slightly greater than the diameter of the largest cable to be insulated according to this method with addition for the insulation.
  • Two carrier wheels 8, 9 of the rope disc type are mounted in bearings on fixed shafts between the frames.
  • a heating element 12 with a mirror 13 for mirror welding, a thermostat 14 and an infra-red detector together are carried by two adjustment screws 16, 17, which are passing through each one corresponding threaded hole in the transverse beams 5, 6, and are arranged between the carrier wheels.
  • the heating element 12 is followed by a cradle 18 comprising bearing for three calibration wheels 20, 21, 22 and is carried by an adjustment screw 19 which passes through a threaded hole in the fifth transverse beam 7.
  • the cradle is rotatable around a shaft and carries at its front end another infra-red detector 23.
  • a holder 24 which is removably attached to the frame 1 and which carries bearing pins for four lower pressure wheels 25, 26, 27, 28.
  • a support wheel 30 which is adjustably mounted in the vertical direction in the frame 1 by means of an adjustment screw 51 but also is removable therefrom.
  • a rocker beam 40 which carries two guide wheels 41, 42, is pivotally mounted on a bolt 33, which over an eccentric 34 with a grip lever 35 is appliably guided from the upper part of the frame 1.
  • a feeder 36 including a funnel element 37 and a knife 38 is pivotally mounted on a bolt 49 which is fixed to the first transverse beam 3 by a thread and two threaded nuts.
  • a replaceable reel for a band 48 which is covered with silica gel, is mounted in the frame 1 above the knife 38.
  • a slide rail 44 which is fastened to the lower part of the frame 1 is shaped as a runner and terminates the device in the downward direction. All details now mentioned are as far as possible made from an aluminium alloy. The function of the method and the device is as follows.
  • the holder 24 When the carriage is on its place the holder 24 is pushed upwardly such that the pressure wheels 25, 26, 27, 28 with a slight pressure lie against the underside of the cable. Thereafter the plastic hose, here denoted with 50, is pushed in through the funnel element 37 over the knife 38 and via guide wheels 31, 32 cut up to band shape in between the underside of the conducting cable and the support wheel 30. The friction of the hose against the conducting cable holds it maintained in that position while the rocker beam 40 by the grip lever 35 is raised to the shown position and the band 48 is inserted inside the hose 50 above the knife 38. The object of the band 48 is to dry the air inside the insulation. Then the carriage is carefully moved forwards on the cable such a distance that the heating element 12 covers the end portion of the cut hose 50.
  • the heating element 12 is adjusted by the adjusting screws 16, 17 to a suitable distance above the conducting wire which is now covered by the cut up plastic hose.
  • the element 12 is put under tension from the ground over the electric cable 47 and will attain a temperature which is controlled by the thermostat 14.
  • the temperature will be about 230°C and is chosen such that the heat radiation which is concentrated to the cut up upper side by the mirror 13, will quickly give the plastic material a temperature which is suitable for welding it together, said temperature also being controlled by the infra-red detector 15.
  • the carriage When the plastic material has attained the right temperature the carriage is moved further a distance such that the calibration wheels 20, 21, 22 successively press together and weld the hot hose edges to each other. A suitable pressure is thereby adjusted by means of the adjustment screw 19.
  • the continuous process may start. For that object the previously mentioned wire which is laid along the conducting cable and fastened to the front end of the carriage and the winch, is started for moving the carriage the chosen distance with even velocity. That the welding is correct is controlled by the infra-red detector 23 which immediately responds to and issues a signal if instead of the surface of the plastic hose it "sees" the conducting wire.
  • the carriage passes the insulator rails the slide rail will provide for sufficient lifting so as to allow free passage. After retying of the thus insulated cable the procedure is repeated on a new cable section.

Landscapes

  • Processing Of Terminals (AREA)
  • Suspension Of Electric Lines Or Cables (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Manufacturing Of Electric Cables (AREA)

Abstract

Les câbles électriques aériens tirés à travers des forêts présentent un inconvénient causé par le fait que les zones déboisées tendent à se repeupler, ce qui provoque des perturbations quand les arbres sont courbés sous le poids de la neige et viennent en contact avec les câbles. On peut limiter cet inconvénient au moyen de câbles isolés, cependant, le remplacement de câbles existants est très cher. L'invention concerne un procédé et un dispositif permettant d'isoler les câbles aériens sur place en les enfermant dans un revêtement isolant en plastique. Elle est principalement caractérisée par un chariot qui se déplace sur le câble et comprend des moyens (30, 41, 42) servant à effectuer des poses successives d'une bande en plastique sur le câble, un élément chauffant (43) servant à chauffer les bords de la bande et un dispositif de serrage (20, 21, 22) servant exercer un rapprochement continu par pression des bords réchauffés et à les souder tout en enfermant le câble.
PCT/SE1996/000640 1995-05-17 1996-05-15 Procede et dispositif d'isolation de cables aeriens WO1996036975A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NO975258A NO975258D0 (no) 1995-05-17 1997-11-17 Fremgangsmåte og anordning for isolering av luftledninger

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9501819-8 1995-05-17
SE9501819A SE9501819L (sv) 1995-05-17 1995-05-17 Metod och apparat för isolering av luftledningar

Publications (1)

Publication Number Publication Date
WO1996036975A1 true WO1996036975A1 (fr) 1996-11-21

Family

ID=20398334

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1996/000640 WO1996036975A1 (fr) 1995-05-17 1996-05-15 Procede et dispositif d'isolation de cables aeriens

Country Status (3)

Country Link
NO (1) NO975258D0 (fr)
SE (1) SE9501819L (fr)
WO (1) WO1996036975A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001063715A1 (fr) * 2000-02-22 2001-08-30 HYDRO-QUéBEC Chariot teleopere d'inspection et d'intervention pour reseau electrique sous tension et outil de deglaçage
US8282078B2 (en) 2009-12-01 2012-10-09 Ballard Jennifer K Cable guide with automatic cable release
US8282080B2 (en) 2009-12-01 2012-10-09 Ballard Jennifer K Cable guide with automatic cable release and method of use
CN103500965A (zh) * 2013-10-11 2014-01-08 洛阳理工学院 输电线路巡检设备用的可伸缩夹持越障机构
CN111786315A (zh) * 2020-07-30 2020-10-16 浙江通源电力工程有限公司 一种高压线维修装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112952716B (zh) * 2021-04-15 2022-07-26 海泰恒通科技(天津)有限公司 一种电力工程用具有防滑功能的电缆除冰装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3485689A (en) * 1966-12-06 1969-12-23 Gen Cable Corp Method and apparatus for making cable
WO1993020565A1 (fr) * 1992-04-07 1993-10-14 Henri Bigot Procede et machine de fabrication d'un faisceau d'elements filaires gaines

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3485689A (en) * 1966-12-06 1969-12-23 Gen Cable Corp Method and apparatus for making cable
WO1993020565A1 (fr) * 1992-04-07 1993-10-14 Henri Bigot Procede et machine de fabrication d'un faisceau d'elements filaires gaines

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001063715A1 (fr) * 2000-02-22 2001-08-30 HYDRO-QUéBEC Chariot teleopere d'inspection et d'intervention pour reseau electrique sous tension et outil de deglaçage
US6494141B2 (en) 2000-02-22 2002-12-17 Hydro-Quebec Remotely operated vehicle for inspection and intervention of a live line
US8282078B2 (en) 2009-12-01 2012-10-09 Ballard Jennifer K Cable guide with automatic cable release
US8282080B2 (en) 2009-12-01 2012-10-09 Ballard Jennifer K Cable guide with automatic cable release and method of use
CN103500965A (zh) * 2013-10-11 2014-01-08 洛阳理工学院 输电线路巡检设备用的可伸缩夹持越障机构
CN111786315A (zh) * 2020-07-30 2020-10-16 浙江通源电力工程有限公司 一种高压线维修装置

Also Published As

Publication number Publication date
SE503943C2 (sv) 1996-10-07
NO975258L (no) 1997-11-17
NO975258D0 (no) 1997-11-17
SE9501819L (sv) 1996-10-07
SE9501819D0 (sv) 1995-05-17

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