CN210245131U

CN210245131U - Fire-resistant cable

Info

Publication number: CN210245131U
Application number: CN201921503600.4U
Authority: CN
Inventors: Ge Zhu; 朱革; Jue Ruan; 阮觉; Jia'en Chen; 陈嘉恩
Original assignee: Zhongshan Electric Wire & Cable Co ltd
Current assignee: Zhongshan Electric Wire & Cable Co ltd
Priority date: 2019-09-11
Filing date: 2019-09-11
Publication date: 2020-04-03
Anticipated expiration: 2029-09-11

Abstract

The utility model provides a fire resisting cable, it includes the oversheath and by a plurality of heart yearns of this oversheath parcel, its characterized in that: the heart yearn includes the copper conductor and wraps mica flame retardant coating and the insulating layer outside the copper conductor in proper order, the inner wall of oversheath is equipped with glass fiber around the covering, and this glass fiber is packed by glass fiber in the covering. The glass fiber wrapping layer is formed by filling glass fiber filling ropes between the core wires and winding glass fiber wrapping tapes outside a rope bundle formed by the glass fiber filling ropes. The utility model discloses a stranding of cable is filled and is adopted glass fiber around the band, and glass fiber fills the rope and has constructed high fire-retardant flame retardant coating around the band, and fire resisting cable's fire resistance test has gained fabulous effect.

Description

Fire-resistant cable

Technical Field

The utility model relates to a fire resisting cable.

Background

The national standard GB/T19666-2005 flame-retardant and fire-resistant wire and cable rules defines the performance requirements of fire-resistant cables, and stipulates that the fire-resistant test must pass the test stipulated in GB/T19216.21, in the actual production, a common manufacturer adopts conductor wrapped mica tape to form a fire-resistant layer to realize, other structures and materials of the cable have no change with the common cable, and through the test, the failure rate of the structure passing the GB/T19216.21 fire-resistant test is very high.

SUMMERY OF THE UTILITY MODEL

For overcoming the defect that exists among the prior art, the utility model provides a fire resisting cable has the fire resistance of preferred, and its concrete technical content is as follows:

the utility model provides a fire-resistant cable, includes the oversheath and by a plurality of heart yearns of this oversheath parcel, the heart yearn includes the copper conductor and wraps mica flame retardant coating and the insulating layer outside the copper conductor in proper order, the inner wall of oversheath is equipped with glass fiber around the covering, and this glass fiber is packed by glass fiber in the covering around.

In the middle of one or more embodiments of the utility model, by glass fiber filling rope with the packing between the heart yearn, form outside the fag end that constitutes in glass fiber filling rope winding area with glass fiber again glass fiber winds the covering.

In one or more embodiments of the present invention, there are more than 2 core wires.

In one or more embodiments of the present invention, the outer sheath and the insulating layer are PVC.

The utility model has the advantages that: the glass fiber wrapping tape is adopted for cabling and filling of the cable, the glass fiber filling rope and the wrapping tape form a high-flame-retardant fireproof layer, and the fireproof test of the fireproof cable achieves a good effect.

Drawings

Fig. 1 is a schematic cross-sectional structure view of the fire-resistant cable of the present invention.

Detailed Description

The scheme of the present application is further described below with reference to fig. 1:

the utility model provides a fire-resistant cable, includes oversheath 1 and by a plurality of heart yearns 2 of this oversheath 1 parcel, heart yearn 2 includes copper conductor 21 and wraps mica flame retardant coating 22 and insulating layer 23 outside copper conductor 21 in proper order, the inner wall of oversheath 1 is equipped with glass fiber around the covering, and this glass fiber is filled by glass fiber in the covering around the covering. Specifically, heart yearn 2 has three, is the triangle-shaped overall arrangement, is the back by glass fiber filling rope 3 packing between the heart yearn 2, forms outside the fag end that glass fiber filling rope 3 constitutes with glass fiber around band 4 twines glass fiber around the covering, and glass fiber filling rope 3 and glass fiber have built high fire-retardant flame retardant coating around band 4, and fire-resistant cable's fire resistance test has obtained fabulous effect. The outer sheath 1 and the insulating layer 23 are both made of PVC materials.

The above preferred embodiments should be considered as examples of the embodiments of the present application, and technical deductions, substitutions, improvements and the like similar to, similar to or based on the embodiments of the present application should be considered as the protection scope of the present patent.

Claims

1. The utility model provides a fire-resistant cable, includes the oversheath and by a plurality of heart yearns of this oversheath parcel, its characterized in that: the heart yearn includes the copper conductor and wraps mica flame retardant coating and the insulating layer outside the copper conductor in proper order, the inner wall of oversheath is equipped with glass fiber around the covering, and this glass fiber is packed by glass fiber in the covering.

2. The fire resistant cable of claim 1, wherein: the glass fiber wrapping layer is formed by filling glass fiber filling ropes between the core wires and winding glass fiber wrapping tapes outside a rope bundle formed by the glass fiber filling ropes.

3. The fire resistant cable of claim 1 or 2, wherein: more than 2 core wires are provided.

4. The fire resistant cable of claim 1 or 2, wherein: the outer sheath and the insulating layer are both made of PVC.