CN2380999Y - Novel five-core fire-retardant electric power cable - Google Patents

Abstract

The utility model relates to a novel five-core fire resistant electric power cable which is composed of five wire cores, taping layers, and fire retardant protective sleeve layers. In the utility model, the outer part of each of the five wire cores is coated by a refractory layer and a fire retardant insulating layer; among the five wire cores, three wire cores are used as three power supply wire cores, one wire core is used as a neutral wire core (N wire), and the last wire core is used as a protective wire core (PE wire); the protective wire core (PE wire) which has a compacted circular cross section is positioned at the center of the five wire cores. The utility model is characterized in that the three power supply wire cores and the neutral wire core (N wire) have the trapezoid like cross sections which have the same shape and size; the three power supply wire cores and the neutral wire core (N wire) are uniformly distributed at the circumference of the protective wire core (PE wire) which has a circular cross section The utility model has the advantages of round and orderly cable cores, compact structure, stability, and material saving for protective sleeves.

Description

A kind of five novel core fireproof power cables

The utility model relates to the cable of transferring electric power, particularly a kind of five novel core fireproof power cables.

Tradition five core fireproof power cables generally all are to adopt to be coated with flame retardant coating, the garden shape structure core of insulating barrier behind stranding, band and sheath and make again.The cable core space of adopting this structure to form is big, and an outside diameter of cable is bigger than normal behind the stranding, and cable core garden not, and outward appearance presents " twisted shape ", " deep-fried twisted dough sticks shape "; Waste of raw materials is bigger in the manufacture process; Such power cable also brings inconvenience to laying poling.

The purpose of this utility model provides a kind of cable core garden cover, and the five novel core fireproof power cables of compact conformation are to solve the weak point that traditional five core fireproof power cables bring.

The purpose of this utility model is achieved like this: a kind of five novel core fireproof power cables, form by 5 cores, colour band layer, flame retardant sheath layer; 5 cores all are coated with flame retardant coating and flame retardant insulation outward; 3 in 5 cores as the three phase mains core; 1 as neutral core (N line); Another root is as protection core (PE line); Protection core (PE line) adopts and presses the garden tee section, is positioned at central authorities; It is characterized in that 3 power supply cores and 1 neutral core (N line) adopt the identical class trapezoid cross section of shape size, be evenly distributed on garden tee section protection core (PE line) around.

It is little that utility model has the cable core space, and the whole outside diameter of cable is than the little 2-4mm of same specification traditional cable, and compact conformation, stable, and saved greatly outside the sheath material, and brought many convenience to laying poling, be the desirable regeneration product of traditional product.

Fig. 1 is a cross-sectional structure schematic diagram of the present utility model.

Below in conjunction with accompanying drawing the utility model is made detailed description.

The five a kind of novel core fireproof power cables of describing in the accompanying drawing 1, form 5 cores (1), (2), (3), (4), (5) outer flame retardant coating (8) and flame retardant insulation (9) of all being coated with by 5 cores (1), (2), (3), (4), (5), belting layer (6), flame retardant sheath layer (7); 3 (1), (2) in 5 cores, (3) are as the three phase mains core; 1 (4) are as neutral core (N line); Another root (5) is as protection core (PE line); Protection core (PE line) adopts and presses circular cross-section, is positioned at central authorities; It is to be formed through stranded pressing by tens of single round copper wire.3 (1), (2), (3) power supply core adopt the identical class trapezoid cross section of shape size with 1 (4) neutral core (N line); be evenly distributed on circular cross-section protection core (PE line) around, these four cores also are to be formed through stranded pressing by tens of single round copper wire.Above-mentioned flame retardant coating (8) is made up of mica tape (6) and glass tape (7); The base of above-mentioned class trapezoid cross section is the circular arc limit.

Claims (3)

1, a kind of five novel core fireproof power cables, form 5 cores (1), (2), (3), (4), (5) outer flame retardant coating (8) and flame retardant insulation (9) of all being coated with by 5 cores (1), (2), (3), (4), (5), belting layer (6), flame retardant sheath layer (7); 3 (1), (2) in 5 cores, (3) are as the three phase mains core; 1 (4) are as neutral core (N line); Another root (5) is as protection core (PE line); Protection core (PE line) adopts and presses circular cross-section, is positioned at central authorities; It is characterized in that 3 (1), (2), (3) power supply core and 1 (4) neutral core (N line) adopt the identical class trapezoid cross section of shape size, be evenly distributed on circular cross-section protection core (PE line) around.

2, a kind of five novel core fireproof power cables according to claim 1 is characterized in that the base of the class trapezoid cross section that 3 (1), (2), (3) power supply core and 1 (4) neutral core (N line) adopt is the circular arc limit.

3, a kind of five novel core fireproof power cables according to claim 1 and 2 is characterized in that 3 (1), (2), (3) power supply core and 1 (4) neutral core (N line) are to be formed through stranded pressing by tens of single round copper wire.

Images