CN2817006Y

CN2817006Y - Colour-ribbon split-phase type one-step silicance crosslinked polyethylene flame-retardant electric power cable

Info

Publication number: CN2817006Y
Application number: CN 03206643
Authority: CN
Inventors: 郑保忠; 郑顺山; 李继涛; 杨俊娟; 郑玉朋; 戚景赞
Original assignee: INST OF WIRE CABLE SCI-TECH Co Ltd HEBEI
Current assignee: INST OF WIRE CABLE SCI-TECH Co Ltd HEBEI
Priority date: 2003-08-01
Filing date: 2003-08-01
Publication date: 2006-09-13
Anticipated expiration: 2013-08-01

Abstract

The utility model relates to a color strip phase splitting type one-step silicane crosslinked polyethylene insulation flame retardant electric power cable which comprises an insulation wire core, wherein a color phase splitting strip thin bar is extruded and made on the insulation layer surface of the insulation wire core; non-woven cloth, a flame retardant covering belt and an armoring layer are selectively covered outside the insulation wire core in sequence, and an outer sheath is covered at the outermost layer of the insulation wire core. The electric power cable uses color strip phase splitting type one-step silicane crosslinked polyethylene as insulation material, thereby, the utility model ensures the electrical performance and physical and mechanical performance of products. The long-term working temperature of a conductor is at 90 DEG C, and the short circuit temperature is at 250 DEG C. Flame retardant grade is divided into A, B, C, and has corresponding fire retardant performance that the grade of A can continuously work for 40 minutes under the flame temperature of 815 DEG C; the grade of B is similar with the grade of A; the grade of C can continuously work for 20 minutes under the flame temperature of 815 DEG C. Simultaneously, the cable has the characteristics of mouse prevention, etc. and good electrical supply reliability, and is suitable for places which have higher security requirements of equipment.

Description

Colour band split-phase type one-step silane cross-linked polyethylene insulation flame-proof power cable

Technical field

The utility model relates to a kind of power transmission cable, particularly relates to a kind of colour band split-phase type one-step silane cross-linked polyethylene insulation flame-proof power cable.

Prior art

Along with the development of China's metallurgy, electric power, coal and electronics industry, progressively the increasing of skyscraper and nuclear power station, the performance of common wiring cable can not satisfy instructions for use far away.Moreover because of causing the accident of fire, the electric wire fault happens occasionally in recent years, as in the scene of a fire, being stopped power supply, cause difficulty will for warning, the illumination of passage, the startup of automatic fire-fighting facility and the operation of other emergency sets owing to electric wire burns out.

Summary of the invention

In view of this; the purpose of this utility model is to provide a kind of colour band split-phase type one-step silane cross-linked polyethylene insulation flame-proof power cable that can overcome the defective of prior art; it has extruded the thin bar of a colour band phase-splitting at the surface of insulating layer of each crosslinked polyetylene insulated core; satisfied cable phase-splitting requirement when mounted; and at protective layers such as the wrapped successively nonwoven fabrics in the periphery of this insulated wire cores, protection against rodents armour, fire-retardant band and fire-retardant oversheaths; in order to the performances such as fire-retardant, protection against rodents of improving cable, improve the security reliability of cable.

For achieving the above object, the technical solution of the utility model is: described colour band split-phase type one-step silane cross-linked polyethylene insulation flame-proof power cable comprises insulated wire cores, surface of insulating layer in this insulated wire cores has extruded the thin bar of a colour band phase-splitting, wraps up nonwoven fabrics, fire-retardant band, armour selectively successively and be wrapped in outermost oversheath outside this insulated wire cores.

Colour band split-phase type one-step silane cross-linked polyethylene insulated power cable of the present utility model makes the electrical property of product and physical and mechanical properties all obtain good assurance owing to adopt colour band split-phase type one-step silane cross-linked polyethylene as insulating material.Wherein the long-term work temperature of conductor is 90 ℃, and the short circuit temperature is 250 ℃.Flame retardant rating is divided into A, B, C three classes, have corresponding fire resistance: wherein the category-A grade can flame temperature up to 815 ℃ following continuous firing 40 minutes, the category-B grade is close with the category-A grade, the C class hierarchy can flame temperature up to 815 ℃ following continuous firing 20 minutes.Simultaneously, this cable has characteristics and good power supply reliabilities such as protection against rodents, is suitable for the place higher to the device security reliability requirement.

Description of drawings

Fig. 1 is the cross section structure schematic diagram of first embodiment of the present utility model;

Fig. 2 is the cross section structure schematic diagram of second embodiment of the present utility model.

Embodiment

Below in conjunction with drawings and Examples the utility model is elaborated.

See also Fig. 1: be a specific embodiment of the present utility model.This colour band split-phase type one-step silane cross-linked polyethylene insulation flame-proof power cable is 3 core cables, and it is by 3 colour band split-phase type insulated wire cores 1 stranded forming, and the gap between each insulated wire cores 1 is filled with pp rope filler 2.Each insulated wire cores 1 comprises conductor 11, be wrapped in the insulating barrier 12 of these conductor 11 peripheries and extrude the thin bar 10 of colour band phase-splitting on this insulating barrier 12.Wrap up fire-retardant band 4 and fire-retardant oversheath 6 successively in this insulated wire cores 1 periphery.

As shown in Figure 2, be the embodiment of another multicore cable of the present utility model.Multicore cable herein is by 5 insulated wire cores, 1 stranded forming, and the gap between each insulated wire cores 1 is filled with pp rope filler 2.Each insulated wire cores 1 comprises conductor 11, be wrapped in the insulating barrier 12 of these conductor 11 peripheries and extrude the thin bar 10 of colour band phase-splitting on this insulating barrier 12.Wrap up nonwoven fabrics 3, steel-tape armouring layer 5 successively and be wrapped in outermost fire-retardant oversheath 6 in this insulated wire cores 1 periphery.

The thickness of the thin bar 10 of described colour band phase-splitting is about 1/20th of insulating barrier 12 thickness, and width is about 1/10th of insulating barrier 12 overall circumferences.

The insulating material of described insulating barrier 12 adopts one-step silane cross-linked polyethylene, installation needs according to multicore cable, extrusion equipment adopts the Three layer coextruding one step crosslinked with silicane production line from Finland Nokia-Mai Raphael company import, is used for producing colour band split-phase type one-step silane cross-linked polyethylene insulated wire cores.Whole production line adopts system controlled by computer, and shows, follows the tracks of the particulars in the production process at any time, can be at any time to becoming the abnormal conditions in the product process to carry out the technology adjustment.

For preventing that minute impurities or dust from entering in the insulating material, Insulation Material must adopt gravity blanking through 1000 grades of purifications, can guarantee raw-material degree of purity, makes the crosslinked polyetylene insulated electrical property that makes obtain better controlled.

Crosslinking agent adopts the import liquid silane, is injected automatically at the hopper neck by technological requirement by the automatic implanter of silane.Can make Insulation Material and silane mixture even, make that to make the crosslinked polyetylene insulated degree of cross linking qualified, avoid crossing crosslinked or the degree of cross linking is not enough.The automatic implanter of its silane is the patented product of our company.

The nonwoven fabrics 3, fire-retardant band 4, steel-tape armouring layer 5 and the fire-retardant oversheath 6 that wrap up successively in insulated wire cores 1 periphery are prior art, specifically wrap up the number of plies and can decide according to the specific requirement of cable laying environment.

Claims

1, a kind of colour band split-phase type one-step silane cross-linked polyethylene insulation flame-proof power cable, it comprises insulated wire cores (1), it is characterized in that: the surface of insulating layer in this insulated wire cores (1) has extruded the thin bar (10) of a colour band phase-splitting, wraps up nonwoven fabrics (3), fire-retardant band (4), steel-tape armouring layer (5) in this insulated wire cores (1) periphery selectively successively and is wrapped in outermost fire-retardant oversheath (6).

2, colour band split-phase type one-step silane cross-linked polyethylene insulation flame-proof power cable according to claim 1, it is characterized in that: the number of described insulated wire cores (1) is 3 or 5 or a plurality of, and by stranded the forming of a plurality of insulated wire cores (1), gap between each insulated wire cores (1) is filled with pp rope filler (2), and each insulated wire cores (1) comprises conductor (11) and is wrapped in the peripheral insulating barrier (12) of this conductor (11).

3, according to the insulation of the colour band split-phase type one-step silane cross-linked polyethylene described in claim 1 or 2 flame-proof power cable, it is characterized in that: the thickness of the thin bar (10) of described colour band phase-splitting is about 1/20th of insulating barrier (12) thickness, and width is about 1/10th of insulating barrier (12) overall circumference.

4, according to the insulation of the colour band split-phase type one-step silane cross-linked polyethylene described in claim 1 or 2 flame-proof power cable, it is characterized in that: the insulating material of described insulating barrier (12) adopts one-step silane cross-linked polyethylene, Insulation Material is through 1000 grades of purifications, and crosslinking agent adopts import silane.