CN200972805Y

CN200972805Y - High fire-resistance cross-linked polyethylene insulated cable

Info

Publication number: CN200972805Y
Application number: CN 200620093399
Authority: CN
Inventors: 姚秀艳
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-09-26
Filing date: 2006-09-26
Publication date: 2007-11-07
Anticipated expiration: 2016-09-26

Abstract

The utility model relates to a new high flame-retarding cross-linked polythene-insulated power cable that comprises metal shielding cores, a flame-retarding wrapping tape and a flame-retarding plastic sheath. The cable is characterized in that a major flame-retarding filler pipe and a minor flame-retarding filler pipe are arranged between the metal shielding cores. The cable has the advantage of meeting the first flame-retarding class specified under the Chinese national standard GB/T18380.3-2000, low weight, low cost, and no hard to operators. The cable is suitable for the occasions requiring a high flame-retarding class and a high work safety standard.

Description

Novel high flame retardant power cable with cross-linked polyethylene insulation

Technical field

The utility model relates to a kind of power cable with cross-linked polyethylene insulation, particularly a kind of novel high flame retardant power cable with cross-linked polyethylene insulation, it is applicable to that high buildings and large mansions, track traffic, subway etc. lay and requires that flame retardant rating is high, densely populated, the place of instructions for use safety strictness, also can be used for mine, thermal power plant, nuclear power station.

Background technology

At present, the employed material of flame retardant cable is flame retardant plastics basically, but only all rests on B, C class (industry flame-retardant standard) mostly with the fire-retardant rank of this material, category-A is difficult to reach, and especially just more is difficult to reach for the non-armouring cross-linked polyethylene insulated cable of middle pressure multicore.So multicore cable will reach that category-A is fire-retardant not only will to rely on flame-proof material, the construction of cable design of science to be arranged more.The main distinction on the various category-A high flame retardant multi-core cable structures is, the selection of design of cable interstitital texture and material.At present, the fire-retardant multicore cable of category-A has following two kinds of structures, and a kind of is the oxygen barrier layer structural cable, a kind of is the cable of doing filling with glass fiber rope or mineral wool rope, though preceding a kind of construction of cable reaches the fire-retardant rank of category-A, the cable bending property is poor, and is very inconvenient for construction and use; Though a kind of cable in back can reach the fire-retardant rank of category-A, but glass fiber rope and mineral wool rope can cause health hazards to the operator, according to medical discovery: the x line rabat that can occur per capita of contact mineral wool, rock wool, mineral wool changes, it is pneumoconiosis, workman mostly occur contact dermatitis, conjunctivitis and the keratitis of contact glass fibre, the visible opacity of the cornea of severe patient and local abscess.

The utility model content

The purpose of this utility model provides a kind of novel high flame retardant power cable with cross-linked polyethylene insulation, and the category-A fire resistance is good, and the operator is not had health hazard again, and cable is convenient to laying installation than oxygen barrier layer structural cable softness.

For realizing above purpose, the technical scheme that the utility model provides comprises metallic shield core, fire-retardant band and flame retardant plastics sheath, it is characterized in that: fire-retardant primary fill pipe and the fire-retardant secondary pipe of filling are set between the metallic shield core.

Above-mentioned fire-retardant primary fill pipe and the fire-retardant secondary hollow pipe that pipe adopts flame retardant plastics to make of filling.

The utility model compared with prior art has the following advantages:

1, adopts fire-retardant filling pipe, make cable become soft, improved the flexibility of cable, also reduced the difficulty of processes simultaneously than the oxygen barrier layer structural cable;

2, the cable operated workman is not had health hazard, stop the generation of occupational disease, because cable industry uses the minimizing of glass fiber rope and mineral wool rope, relative cutter has also been reduced health hazard simultaneously, have the certain social benefit.

3, because of filling pipe with the flame retardant plastics manufacturing, promptly reduced the manufacturing cost of cable, alleviated cable weight again.

4, in producing, press multicore cable, need tens even hundreds of root if adopt the glass fiber rope to fill, and adopt fire-retardant filling pipe only to need several just can make cable fill rounding, can enhance productivity greatly.

5, product reaches the category-A flame retardant rating of GB/T18380.3-2000 standard, is fit to be laid in require flame retardant rating height, the occasion of instructions for use safety strictness.

Description of drawings

Fig. 1 is the utility model structural representation (cross section).

Embodiment

As shown in Figure 1, the part sequence number among the figure is: conductor 1, conductor screen 2, crosslinked polyetylene insulated 3, insulation shielding 4, metallic shield 5, fire-retardant primary fill pipe 6, fire-retardant secondary pipe 7, (wrapped) fire-retardant band 8, the fire retardant jacket plastics (extruding) 9 of filling.

The model specification of trial-production cable is WDZA-YJE26/35kV, 3 * mm ²Trial-production length is 200 meters.

The structure of metallic shield core is formed and comprised: conductor 1, conductor screen 2, crosslinked polyetylene insulated 3, insulation shielding 4 and metallic shield 5, the cross section of conductor 1 wherein is 95mm ², form copper conductor by 19/Φ 2.16mm, be in the GB/T3956 standard second kind, conductor diameter is 11.4mm.

Conductor screen 2, crosslinked polyetylene insulated 3 and the expressing technique of insulation shielding 4 extrude simultaneously by three-layer co-extruded equipment.Metal screen layer 5 at the wrapped copper strips in the outside of insulation shielding 4.

Then with three metallic shield core strandings, and between each metallic shield core, fill fire-retardant primary fill pipe 6 and the fire-retardant secondary pipe 7 of filling.The effective flame retardant plastics manufacturing of these two kinds of fire-retardant fillings is extruded with common extruder.

At the wrapped fire-retardant band 8 in cable core outside, its outside extrudes fire retardant jacket plastics 9 again, has formed good flame-retardant layer structure then.

Claims

1, a kind of novel high flame retardant power cable with cross-linked polyethylene insulation comprises metallic shield core, fire-retardant band and flame retardant plastics sheath, it is characterized in that: fire-retardant primary fill pipe and the fire-retardant secondary pipe of filling are set between the metallic shield core.

2, novel high flame retardant power cable with cross-linked polyethylene insulation according to claim 1 is characterized in that: fire-retardant primary fill pipe and the fire-retardant secondary hollow pipe that pipe adopts flame retardant plastics to make of filling.