CN202720962U

CN202720962U - A flame-retardant cable

Info

Publication number: CN202720962U
Application number: CN 201220343370
Authority: CN
Inventors: 许继祖; 周之宇; 江德海
Original assignee: NIANFENG CABLE (SUZHOU) Co Ltd
Current assignee: NIANFENG CABLE (SUZHOU) Co Ltd
Priority date: 2012-07-17
Filing date: 2012-07-17
Publication date: 2013-02-06
Anticipated expiration: 2022-07-17

Abstract

The utility model discloses a flame-retardant cable comprising wires, a tearing rope, and an outer sheath wrapped round the wires and the tearing rope. Every two wires are mutually twisted to form a twisted pair wire. Each wire comprises a conductor and an insulating layer wrapped round the conductor. The insulating layer comprises an inner insulating layer which is a polyethylene insulating layer and an outer insulating layer which is a polrvinyl chloride insulating layer. By above manner, the flame-retardant cable satisfies communication requirement and achieves flame resistance with low cost. When suffered from fire, the flame-retardant cable is capable of limiting burning within a local scope, preventing spread and larger loss.

Description

A kind of flame retardant cable

Technical field:

The utility model relates to telecommunication cable, is specifically related to a kind of flame retardant cable with anti-flammability.

Background technology:

Along with the development of society, communication and network have infiltrated through the every aspect of our life, and along with the development of communication and network technology, the data cable of various functions also is developed and applied.For common cable, generally only consider signal transmission performance, seldom can take into account anti-flammability.And for the special flame retardant cable that relates to or fire-resisting cable, too high because of its cost again, can not generally use.So design a kind of communicating requirement that both satisfied, can under low-cost condition, have anti-flammability again, make in the situation of catching fire, can be limited in burning in the subrange, do not produce and spread, that avoids that the flame retardant cable that results in greater loss just becomes is necessary.

The utility model content:

For above-mentioned deficiency of the prior art, the utility model purpose provides a kind of flame retardant cable, this cable had both satisfied communicating requirement, can under low-cost condition, have anti-flammability again, in the situation of catching fire, can be limited in burning in the subrange, not produce and spread, avoid resulting in greater loss.

For achieving the above object, the technical scheme that the utility model provides is: a kind of flame retardant cable, comprise wire, tear rope and coated wire and tear the oversheath of rope, described wire twists into mutually one group of twisted pair wire pair in twos, wherein, described wire is comprised of the insulating barrier of conductor and coating conductor, and described insulating barrier is divided into inner insulating layer and external insulation layer, described inner insulating layer is polyethylene layer, and described external insulation layer is the polyvinyl chloride insulation layer.

Preferably, the volume ratio of described polyvinyl chloride insulation layer and polyethylene layer is 1: 1-3: 2.

What further, described conductor adopted is copper-clad mild steel conductor.

Further, described jacket material is polyvinyl chloride.

The optimum volume ratio of the polyvinyl chloride insulation layer described in the utility model and polyethylene layer is 1: 1, under this ratio condition, can satisfy the anti-flammability of cable, and it is minimum that Financial cost is dropped to.Because adopt the cost of other material (such as tetrafluoroethene) very high.

The beneficial effects of the utility model are: cost is lower, makes simply, is guaranteeing to have higher anti-flammability under the good signal transmission capabilities.

Description of drawings:

Fig. 1 is the structural representation of the utility model one preferred embodiment;

Fig. 2 is the structural representation of wire 3 among Fig. 1;

Each parts mark is as follows among the figure: the 1-oversheath, and 2-twisted pair wire pair, the 3-wire, the 30-conductor, the 31-polyethylene layer, 32-polyvinyl chloride insulation layer, 4-tears rope.

Specific embodiment:

Below in conjunction with accompanying drawing preferred embodiment of the present utility model is described in detail, thereby so that advantage of the present utility model and feature can be easier to be it will be appreciated by those skilled in the art that protection range of the present utility model is made more explicit defining.

Please refer to accompanying drawing 1 and accompanying drawing 2, a kind of flame retardant cable comprises wire 3, tears rope 4 and coated wire 3 and tears rope 4 oversheath 1 that wire 3 has 8 in the present embodiment, per two wires 3 twist into mutually one group of twisted pair wire to 2, and purpose is the cross-talk that reduces signal of communication in the transmission course.

Wire 3 is comprised of conductor 30, polyethylene layer 31 and polyvinyl chloride insulation layer 32, wherein, and polyethylene layer 31 coating conductors 30, polyvinyl chloride insulation layer 32 coating conductor 30 and polyethylene layer 31.Polyvinyl chloride insulation layer 32 is 1: 1 with the volume ratio of polyethylene layer 31 in the present embodiment, and at this moment, insulating barrier both satisfied the shielding action in the conductor signals transmission, satisfies again under the condition of most economical cost to possess fire resistance.

What conductor 30 adopted in the present embodiment is copper-clad mild steel conductor, and its advantage is that intensity is larger, stretch-proof.

Oversheath 1 in the present embodiment adopts lower-cost polythene material to make, and prevents the wearing and tearing of data cable.

In a kind of flame retardant cable of the utility model, the volume ratio of polyvinyl chloride insulation layer and polyethylene layer can be set as according to actual needs 1: 1-3: between 2.

The above only is embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.

Claims

1. flame retardant cable, comprise wire, tear rope and coated wire and tear the oversheath of rope, described wire twists into mutually one group of twisted pair wire pair in twos, it is characterized in that, described wire is comprised of the insulating barrier of conductor and coating conductor, described insulating barrier is divided into inner insulating layer and external insulation layer, and described inner insulating layer is polyethylene layer, and described external insulation layer is the polyvinyl chloride insulation layer.

2. flame retardant cable according to claim 1 is characterized in that, the volume ratio of described polyvinyl chloride insulation layer and polyethylene layer is 1: 1-3: 2.

3. flame retardant cable according to claim 1 and 2 is characterized in that, what described conductor adopted is copper-clad mild steel conductor.

4. flame retardant cable according to claim 1 and 2 is characterized in that, described jacket material is polyvinyl chloride.