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WO2006094432A1 - Corps de protection isolant possedant un cone de contrainte et appartenant a un cable retrecissable a froid - Google Patents

Corps de protection isolant possedant un cone de contrainte et appartenant a un cable retrecissable a froid Download PDF

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Publication number
WO2006094432A1
WO2006094432A1 PCT/CN2005/000283 CN2005000283W WO2006094432A1 WO 2006094432 A1 WO2006094432 A1 WO 2006094432A1 CN 2005000283 W CN2005000283 W CN 2005000283W WO 2006094432 A1 WO2006094432 A1 WO 2006094432A1
Authority
WO
WIPO (PCT)
Prior art keywords
stress cone
cable insulation
elastic base
creeper
grower
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/CN2005/000283
Other languages
English (en)
Chinese (zh)
Inventor
Heping Zhou
Shufeng Kang
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to PCT/CN2005/000283 priority Critical patent/WO2006094432A1/fr
Publication of WO2006094432A1 publication Critical patent/WO2006094432A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
    • H02G15/182—Cable junctions protected by sleeves, e.g. for communication cable held in expanded condition in radial direction prior to installation
    • H02G15/1826—Cable junctions protected by sleeves, e.g. for communication cable held in expanded condition in radial direction prior to installation on a removable hollow core, e.g. a tube
    • H02G15/1833—Cable junctions protected by sleeves, e.g. for communication cable held in expanded condition in radial direction prior to installation on a removable hollow core, e.g. a tube formed of helically wound strip with adjacent windings, which are removable by applying a pulling force to a strip end
    • 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
    • H02G15/02—Cable terminations
    • H02G15/06—Cable terminating boxes, frames or other structures
    • H02G15/064—Cable terminating boxes, frames or other structures with devices for relieving electrical stress
    • H02G15/068—Cable terminating boxes, frames or other structures with devices for relieving electrical stress connected to the cable shield only
    • 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
    • H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
    • H02G15/184—Cable junctions protected by sleeves, e.g. for communication cable with devices for relieving electrical stress
    • H02G15/188—Cable junctions protected by sleeves, e.g. for communication cable with devices for relieving electrical stress connected to a cable shield only

Definitions

  • the invention relates to a cable accessory, in particular to an insulating body of a cold-shrinkable cable of 66 kV or more. Background technique
  • the cable insulation body of the specification above 66kV generally includes an intermediate joint and a terminal joint, wherein the intermediate joint of the cable mainly has the following types: a wrapped joint, a molded joint, a prefabricated joint, and a prefabricated joint.
  • These types of joints generally have the disadvantages of complicated installation, high technical requirements, long construction period, etc.
  • the prefabrication type has been greatly improved, it still cannot meet the needs of on-site construction.
  • the terminal fittings are divided into porcelain sleeve type and prefabricated type, etc.
  • the porcelain sleeve type adopts the inner prefabricated rubber stress cone and the outer porcelain sleeve oil filling structure, and has the following disadvantages: 1) complicated parts are combined and difficult to assemble; 2) insulating silicone oil needs to be considered
  • the compatibility of the rubber stress cone prevents the stress cone from immersing in the oil medium for a long time and loses its elasticity, and internally decomposes.
  • the prefabricated terminal connector has the following disadvantages: In order to prevent the gap between the terminal connector and the cable insulation from being discharged, it is necessary to ensure the interference fit after installation, which makes the installation laborious, the cable is not easy to be inserted, some for the cable, or even the reverse chain. Tool, great confirmation The stress cone structure is destroyed, and the conductive material slides over the cable insulation surface, easily leaving conductive carbon particles, and the safety performance is lowered. Summary of the invention
  • the technical problem to be solved by the present invention is to provide a stress-cone-based cold-shrinkable cable insulation body that is easy to install, has good sealing performance, and is safe for the above-mentioned drawbacks of the prior art.
  • the technical solution adopted by the present invention to solve the technical problem is: constructing a stress-cone-based cold-shrinkable cable insulation body, comprising an elastic base body, the elastic base body being provided with a central through hole, the central through hole including a first port and a second port, wherein the central through hole is further provided with a support tube adapted to be larger when the inner diameter thereof becomes larger, and the support tube is provided with a pull-out device for facilitating pulling the elastic base body back to the original shape.
  • the first port or/and the second port of the elastomeric substrate are provided with a stress cone.
  • the second port of the elastic base body is provided with a creeper grower, and the creeper grower is provided with a center penetrating the central through hole Containing holes.
  • the creeper grower and the elastic base body may also be a unitary structure.
  • the elastic base body is sealingly coupled to the creepage distance grower.
  • the creeper growers are also connected to each other.
  • the creeper grower is at least one.
  • the creeper grower The exterior has at least one shed that protrudes outward.
  • the central portion of the central through hole of the elastic base body is further provided with an inner shielding tube, and stress cones are arranged at both ends.
  • the outer portion of the elastic substrate is provided with an outer shield layer.
  • the stress cone has a funnel shape, and a large opening is disposed in the elastic matrix, and the stress cone surrounds the first port and forms 10° with the axis thereof. — 60° angle, the inner arc of the stress cone gradually forms a smooth transition.
  • the product is expanded and supported by a support tube before leaving the factory or at the construction site.
  • the invention has the beneficial effects that the stress cone-based cold-shrinkable cable insulation body of the invention adopts a cold-shrinking structure, so that the sealing property is good, the installation is convenient, and the cable of various specifications can be matched;
  • the growth device makes the expansion exhibition better;
  • the elastic matrix and the creeper grower adopt special elastic materials, weather resistance, long life and high reliability;
  • FIG. 1 is a schematic structural view of an elastic base of a cold-shrinkable cable insulation body of the present invention
  • FIG. 2 is a schematic structural view of a creeper of the cold-shrinkable cable insulation body of the present invention
  • FIG. 3 is a schematic structural view of the elastic base of the cold-shrinkable cable insulation body of the present invention in cooperation with a creeper
  • 3A is a perspective structural view of a stress cone of a cold-shrinkable cable insulation body of the present invention
  • FIG. 4 is a schematic structural view of a cold-shrink cable insulation body of the present invention mated with a support tube
  • FIG. 4A is a cold-shrinkable cable insulation of the present invention
  • Figure 5 is a schematic view showing the structure of the two creeping distance creepers of the cold-shrinkable cable insulation body of the present invention
  • Figure 6 is a front view showing an embodiment of the support pipe of the cold-shrinkable cable insulation body of the present invention
  • Figure 8 is a cross-sectional view showing an unfolded state of an embodiment of a support tube of the cold-shrinkable cable insulation body of the present invention.
  • Figure 9 is a cross-sectional view showing the outer shield of the cold-shrinkable cable insulation body of the present invention partially provided with an outer shield;
  • Figure 10 is a schematic view showing an embodiment of a cold-shrinkable cable insulation body of the present invention in which the intermediate joint is expanded to include a support tube.
  • FIG. 1 is a schematic structural view of an elastic base body of a cold-shrinkable cable insulation body according to the present invention.
  • the elastic base body 6 is provided with a central through hole 121.
  • the central through hole 121 includes two ports, and the stress cone 1 is a funnel shape.
  • the angle around the port and its axis forms an angle of 10° - 60°, as shown in Fig. 3A is the angle structure of the stress cone of the cold-shrinkable cable insulation body of the present invention.
  • the inner curved surface of the stress cone 1 gradually forms a rounded transition, and the large opening is disposed in the elastic base 6.
  • the elastic base body 6 is made of an elastic insulating material, and the stress cone 1 is a semi-conductive elastic material, wherein the semi-conductive material and the outer casing are integrated without a gap, so that the use thereof is safer.
  • 2 is a schematic structural view of a creeper grower of the cold-shrinkable cable insulation body of the present invention, wherein the creeper grower 2 is also an elastic material, and a central receiving hole 22 is disposed in the middle, and at least one outer portion is provided
  • the sheds 21 are protruded outward, and the sheds 21 increase the creepage distance, and the sheds 21 may be the same size or different.
  • FIG. 6 is a front view of a support tube of a preferred embodiment
  • FIG. 7 is a front view of a preferred embodiment of the support tube in an unfolded state
  • FIG. 8 is a cross-sectional view of FIG.
  • the support tube 3 is composed of a tearable strip 31 which is arranged in a circle, and the tear strips 31 are arranged in parallel along the axial direction of the support tube 3, and a connecting device is arranged between the adjacent tear strips 31, the connection
  • the device is an adjacently disposed groove 311 and a protrusion 312 matched thereto, such that the protrusion 312 of the tearable band 31 of the adjacent ring is fastened in the groove 311 to connect the tear strip 31, and the end ring
  • the easy tear tape 31 is connected with a pull-out device 32 (tap).
  • FIG. 4 is a schematic structural view of the cold-shrinkable cable insulation body of the present invention and the support pipe; as shown in FIG. 4A, the creeper grower 2 is provided with a support pipe 3, and the creeper grower 2 is disposed on the elastic base body.
  • the sealing end 13 of the 6 (the end of the stress cone 1 is not provided), the creeping distance grower 2 is sealingly connected to the elastic base 6, and the installation step is to pre-expand the elastic base 6 and the creeper 2 in the factory.
  • the support tube 3 is placed therein.
  • the matching cable is stripped to a certain size as required.
  • the elastic base body 6 is placed in a fixed position of the cable, the support tube 3 is pulled out, and the creepage distance is increased.
  • the device 2 is sleeved into the cable and overlaps with the sealing end 13 of the elastic base body 6 (the end where the stress cone 1 is not provided), and the support tube 3 is pulled out, and the creepage growth device 2 functions to increase the external creepage distance and the insulation performance.
  • the effect of the stress cone 1 is to even the electric field at the outer shield of the cable.
  • the present invention can also have other embodiments, the plurality of creeper growers 2 are plugged and connected, and the central receiving holes are connected to each other. As shown in FIG. 5, the structure of the two creeping distance growers is shown. In the figure, the creepage grower 2 is connected in the same manner as the front, and the creepage grower 2 is inserted and then the support tube 3 is taken out.
  • the present invention may have other embodiments in which the creeper grower 2 is integrated with the elastic base 6.
  • FIG. 9 Another embodiment of the present invention is shown in FIG. 9, wherein both ports of the elastic base 6 are provided with a stress cone 1, which can be used as a middle joint of a cold-shrinkable cable, and a central through hole 121 of the elastic base 6.
  • An inner shield tube 4 is also provided in the middle portion, and an outer shield layer 7 is provided on the outer portion.
  • the support tube 3 is supported in the intermediate joint.
  • the outline of the support tube is expanded after the intermediate joint is expanded.
  • the stress cone 1 is added to properly solve the electric field concentration problem at the outer shield cut of the cable, and the inner shield tube 4 is The function is to equalize the electric field at the fracture of the shield inside the cable.
  • the stress cone not only needs to fully meet the electrical requirements, but also meets the mechanical and thermal requirements. Even under high pressure, the partial discharge can be minimized, so that it can adapt to various environments. .
  • the elastic base body 6 and the creepage distance grower 2 are formed by compression vulcanization, and are expanded to a predetermined process diameter after demolding, and inserted into the support tube 3 to keep the product caliber constant is the finished product, and the product of the present invention is put into the stripped state when used.
  • the pulling device 32 is pulled to drive the tearable strip 31 of the connecting ring, thereby pulling the tearable strip 31 of the other ring to be pulled out, thereby withdrawing the entire supporting tube 3 to shrink the elastic base 6 on the cable. It is necessary to connect a plurality of creeper growers 2, and the creepage grower 2 is also inserted in the same manner as described above.

Landscapes

  • Cable Accessories (AREA)

Abstract

L’invention concerne un corps de protection isolant possédant un cône de contrainte et appartenant à un câble rétrécissable à froid qui comprend un corps de base élastique. Le corps de base élastique se compose d’un trou traversant central constitué d’un premier et d’un second orifices. Un tuyau de soutien est disposé dans le trou traversant central. Le tuyau de soutien est adapté au trou traversant central lorsque son diamètre interne augmente. Le tuyau de soutien est doté d’un dispositif d’extraction qui permet de sortir le tuyau de soutien du trou traversant central de manière à ce que le corps de base élastique puisse se relâcher. Le premier orifice ou/et le second orifice du corps de base élastique comprend un cône de contrainte. Un autre corps de protection isolant est doté d’un cône de contrainte à chacune de ses extrémités. Un tuyau de protection est disposé à l’intérieur de ce corps. Et une couche de protection est disposée à l’extérieur de ce corps.
PCT/CN2005/000283 2005-03-08 2005-03-08 Corps de protection isolant possedant un cone de contrainte et appartenant a un cable retrecissable a froid Ceased WO2006094432A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2005/000283 WO2006094432A1 (fr) 2005-03-08 2005-03-08 Corps de protection isolant possedant un cone de contrainte et appartenant a un cable retrecissable a froid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2005/000283 WO2006094432A1 (fr) 2005-03-08 2005-03-08 Corps de protection isolant possedant un cone de contrainte et appartenant a un cable retrecissable a froid

Publications (1)

Publication Number Publication Date
WO2006094432A1 true WO2006094432A1 (fr) 2006-09-14

Family

ID=36952935

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2005/000283 Ceased WO2006094432A1 (fr) 2005-03-08 2005-03-08 Corps de protection isolant possedant un cone de contrainte et appartenant a un cable retrecissable a froid

Country Status (1)

Country Link
WO (1) WO2006094432A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997009762A1 (fr) * 1995-09-05 1997-03-13 Asea Brown Boveri Ab Terminaison pour cable
CN2672931Y (zh) * 2003-11-21 2005-01-19 深圳市沃尔热缩材料有限公司 冷缩电缆附件终端

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997009762A1 (fr) * 1995-09-05 1997-03-13 Asea Brown Boveri Ab Terminaison pour cable
CN2672931Y (zh) * 2003-11-21 2005-01-19 深圳市沃尔热缩材料有限公司 冷缩电缆附件终端

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121 Ep: the epo has been informed by wipo that ep was designated in this application
DPE2 Request for preliminary examination filed before expiration of 19th month from priority date (pct application filed from 20040101)
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