CN202712810U

CN202712810U - Integrated thermal shrinkage cable intermediate joint

Info

Publication number: CN202712810U
Application number: CN 201220359884
Authority: CN
Inventors: 王庆玖; 王松伟
Original assignee: Jiangsu Huakan Nuclear Power Equipment Technology Co Ltd
Current assignee: Jiangsu Huakan Nuclear Power Equipment Technology Co Ltd
Priority date: 2012-07-24
Filing date: 2012-07-24
Publication date: 2013-01-30
Anticipated expiration: 2022-07-24

Abstract

The utility model discloses an integrated thermal shrinkage cable intermediate joint, comprising a conductor connecting pipe, a stress composite pipe, an inner insulating pipe, an outer insulating pipe, a semiconductive pipe and a jacket composite pipe, wherein the two ends of the conductor connecting pipe are respectively connected with the conductor cores of two segments of cables; the stress composite pipe is wrapped outside the connecting pipe, and the two ends of the stress composite pipe are respectively lapped with the insulating shielding layers of the two segments of cables; the inner insulating pipe is wrapped outside the stress composite pipe; the outer insulating pipe is wrapped outside the inner insulating pipe and the stress composite pipe, and the two ends of the outer insulating pipe are respectively lapped with the insulating shielding layers of the two segments of cables; the semiconductive pipe is wrapped outside the outer insulating pipe, and the two ends of the semiconductive pipe are respectively lapped with the copper shielding layers of the two segments of cables; and the jacket composite pipe is wrapped outside the semiconductive pipe, and the two ends of the jacket composite pipe are respectively lapped with the outer jackets of the two segments of cables. The integrated thermal shrinkage cable intermediate joint disclosed by the utility model can be used for reducing the local discharge capacity, reinforcing the sealing and insulating properties and prolonging the service life of the thermal shrinkage cable intermediate joint, and the integrated thermal shrinkage cable intermediate joint is very simple in mounting.

Description

Integral type pyrocondensation cable intermediate joint

Technical field

The utility model relates to a kind of electric cable accessories, specifically, relates to a kind of integral type pyrocondensation cable intermediate joint.

Background technology

At present, because the pyrocondensation cable intermediate joint is cheap, adaptive capacity to environment is strong, is widely used.In the pyrocondensation cable intermediate joint on the market, major part is divided into sheath multiple tube, semiconductive pipe, external insulation pipe, interior insulated tube and stress multiple tube more than 2 sections or 2 sections; Particularly the stress tube of electric stress control section all is to adopt 2 ~ 3 sections designs, and makes " pencil stub " in the insulation end.Cable integrality of when doing transition joint itself has been subject to destruction, and joint becomes the weak location in the cable line, and fault in most cases all occurs in joint location.The segmented design causes the very inconvenience of installation of product; Must be whittled into " pencil stub " shape doing transition joint time cable insulation end, inconvenient operation, partial discharge quantity are difficult to control; Sealing effectiveness is not very desirable, easily causes moisture or moisture to be invaded; More than have a strong impact on the useful life of transition joint, long-term a large amount of partial discharge finally causes the generation of transition joint breakdown accident simultaneously.

Summary of the invention

The purpose of this utility model is the defective that overcomes prior art, a kind of integral type pyrocondensation cable intermediate joint is provided, it can reduce partial discharge quantity, enhanced leaktightness and insulation property, and the useful life that can prolong the pyrocondensation cable intermediate joint, and installs fairly simple.

The technical scheme that realizes the utility model purpose is: a kind of integral type pyrocondensation cable intermediate joint, and it comprises conductor connecting tube, stress multiple tube, interior insulated tube, external insulation pipe, semiconductive pipe and sheath multiple tube; The two ends of conductor connecting tube connect respectively the conductor thread core of two sections cables; The stress multiple tube is coated on outside the tube connector, and two ends respectively with the insulation screen of two sections cables overlap joint; Interior insulated tube is coated on outside the stress multiple tube; The external insulation pipe is coated on outside interior insulated tube and the stress multiple tube, and two ends respectively with the insulation screen of two sections cables overlap joint; The semiconductive pipe is coated on outside the external insulation pipe, and two ends respectively with the copper shield of two sections cables overlap joint; The sheath multiple tube is coated on outside the semiconductive pipe, and two ends respectively with the oversheath of two sections cables overlap joint.

After having adopted technique scheme, because the utility model is recovering cable each several part structure and is realizing Stress Control, the sheath multiple tube that adopts, semiconductive pipe, external insulation pipe, interior insulated tube and stress multiple tube are a whole not segmentation, effectively reduced the slit between transition joint and the cable, sealing effectiveness is good; Employed tubing quantity is few, be not easy in the installation process to produce obscure, easy to operate, the insulating barrier end that not be used in cable makes " pencil stub ", has simplified the manufacturing process of whole cable intermediate joint; The specific insulation of stress multiple tube is not less than 10 ¹⁶Ω cm; dielectric constant is not less than 25; this stress multiple tube had both been realized electric stress control function; reduced again simultaneously the partial discharge quantity of transition joint position; interior insulated tube and external insulation pipe have been strengthened insulation property of the present utility model; applied range, long service life, the sheath multiple tube plays the function of waterproof and mechanical protection to the outside.

Description of drawings

Fig. 1 is the structural representation of integral type pyrocondensation cable intermediate joint of the present utility model;

Fig. 2 is the structural representation of integral type pyrocondensation cable intermediate joint electric stress control section of the present utility model.

Embodiment

Content of the present utility model is easier to be expressly understood in order to make, and the below is described in further detail the utility model according to specific embodiment also by reference to the accompanying drawings,

As depicted in figs. 1 and 2, a kind of integral type pyrocondensation cable intermediate joint, it comprises conductor connecting tube 11, stress multiple tube 6, interior insulated tube 5, external insulation pipe 4, semiconductive pipe 3 and sheath multiple tube 2; The two ends of conductor connecting tube 11 connect respectively the conductor thread core 10 of two sections cables; Stress multiple tube 6 is coated on outside the tube connector 11, and two ends respectively with insulation screen 8 overlap joint of two sections cables; Interior insulated tube 5 is coated on outside the stress multiple tube 6; External insulation pipe 4 is coated on outside interior insulated tube 5 and the stress multiple tube 6, and two ends respectively with insulation screen 8 overlap joint of two sections cables; Semiconductive pipe 3 is coated on outside the external insulation pipe 4, and two ends respectively with copper shield 7 overlap joint of two sections cables; Sheath multiple tube 2 is coated on outside the semiconductive pipe 3, and two ends respectively with oversheath 1 overlap joint of two sections cables.

The structure of cable is prior art, and it comprises conductor thread core 10, insulation screen 8, copper shield 7, oversheath 1 and insulating barrier 9.

Operation principle of the present utility model is as follows:

Because the utility model is recovering cable each several part structure and is realizing Stress Control, the sheath multiple tube 2 that adopts, semiconductive pipe 3, external insulation pipe 4, interior insulated tube 5 and stress multiple tube 6 are a whole not segmentation, effectively reduced the slit between transition joint and the cable, sealing effectiveness is good; Employed tubing quantity is few, be not easy in the installation process to produce obscure, easy to operate, insulating barrier 9 ends that not be used in cable make " pencil stub ", have simplified the manufacturing process of whole cable intermediate joint; The specific insulation of stress multiple tube 6 is not less than 10 ¹⁶Ω cm; dielectric constant is not less than 25; this stress multiple tube 6 had both been realized electric stress control function; reduced again simultaneously the partial discharge quantity of transition joint position; interior insulated tube 5 and external insulation pipe 4 have been strengthened insulation property of the present utility model; applied range, long service life, the function of waterproof and mechanical protection is played in 2 pairs of outsides of sheath multiple tube.

During installation with oversheath 1, copper shield 7, insulation screen 8, insulating barrier 9 size is as requested opened stripping, install conductor connecting tube 11 at two conductor thread cores 10 of removing insulating barrier 9, and carry out crimping, conductor connecting tube 11 surfaces are wrapped semiconductive self-adhesive tape successively, fluid sealant and Stress Control glue, two ends with whole stress multiple tube 6 after finishing are installed in respectively between the copper shield 7 of two sections cables, form overlap joint with insulation screen 8 fractures, insulated tube 5 in installing successively, external insulation pipe 4, semiconductive pipe 3, sheath multiple tube 2 and other auxiliary accessories.In the whole installation process, insulating barrier 9 incision positions of cable need not " pencil stub " made in the traditional pyrocondensation transition joint of picture in the end of the insulating barrier 9 of cable mode, have effectively reduced the partial discharge quantity at this position; The recovery of each several part structure is adopted and is all adopted one whole tubing to finish, and sealing effectiveness is better, and the installation error rate is extremely low; Whole installation process is simple and convenient, quick; Prolong the transition joint purpose in useful life thereby reach.

Above-described specific embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; institute is understood that; the above only is specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.

Claims

1. integral type pyrocondensation cable intermediate joint, it is characterized in that: it comprises conductor connecting tube (11), stress multiple tube (6), interior insulated tube (5), external insulation pipe (4), semiconductive pipe (3) and sheath multiple tube (2); The two ends of conductor connecting tube (11) connect respectively the conductor thread core (10) of two sections cables; Stress multiple tube (6) is coated on outside the tube connector (11), and two ends respectively with the insulation screen (8) of two sections cables overlap joint; Interior insulated tube (5) is coated on outside the stress multiple tube (6); External insulation pipe (4) is coated on outside interior insulated tube (5) and the stress multiple tube (6), and two ends respectively with the insulation screen (8) of two sections cables overlap joint; Semiconductive pipe (3) is coated on outside the external insulation pipe (4), and two ends respectively with the copper shield (7) of two sections cables overlap joint; Sheath multiple tube (2) is coated on outside the semiconductive pipe (3), and two ends respectively with the oversheath (1) of two sections cables overlap joint.