CN201392689Y

CN201392689Y - Environment-friendly fire resistant cable

Info

Publication number: CN201392689Y
Application number: CN200920172769U
Authority: CN
Inventors: 万以章; 后学士; 巫春生
Original assignee: Anhui Dujiang Cable Group Co Ltd
Current assignee: Anhui Dujiang Cable Group Co Ltd
Priority date: 2009-04-21
Filing date: 2009-04-21
Publication date: 2010-01-27
Anticipated expiration: 2019-04-21

Abstract

The utility model discloses an environment-friendly fire resistant cable. The environment-friendly fire resistant cable comprises a cable core consisting of a plurality of core strands, a filling layer in the gap of the cable core, and a sheath layer on the outermost layer of the cable core, wherein the cable core includes a conductor, a fire resistant layer formed by wrapping the a fire resistant mica tape on the conductor, and an insulation layer on the outer layer of the cable core; the a protection layer formed of high-temperature fire retardant glass fabric is arranged outside the fire resistant layer; the insulation layer is extruded outside the protection layer; a wrapping layer formed of the high-temperature fire retardant glass fabric is arranged outside the cable core; and the sheath layer is extruded on the wrapping layer. The natural mica tape and the high-temperature fire retardant glass fabric outside the conductor of the cable can effectively protect the fire resistant layer so as to greatly enhance the mechanical property of the fire resistant layer.

Description

The environment-friendly type fire-resisting cable

Technical field:

The utility model relates to a kind of cable, specifically a kind of environment-friendly type fire-resisting cable that is applied in occasions such as skyscraper, subway tunnel, power station.

Background technology:

In occasions such as skyscraper, subway tunnel, power station, in case fire alarm, fire take place, need in time promptly to evacuate an endless flow of people, rescue critical facility, and the work of the disaster relief of putting out a fire.Therefore wish when fire is just sent out to have the regular hour to guarantee the normal effectively running of lighting circuit, elevator and some fire-fighting equipments.But, can aggravate burning when in a single day common cable runs into fire, when propagating combustion, also there are the problems such as halogen gas that the amount of being fuming is big and generation is a large amount of, visibility when a large amount of smog makes fire reduces, give to withdraw and bring very big obstruction with fire-fighting, and halogen gas easily makes the people suffocate, thereby the personnel after to a certain degree can increasing the fire generation and the loss of property.In addition, the reaction of halogen gas and airborne water generates the halogenation hydracid, as HF, HCl, HBr etc., also can cause the corrosion of equipment, even corrosion concrete etc. causes secondary disaster.Fire-resisting cable is used in these key areas, its fire-resistant layer structure of fire-resisting cable in the prior art is that overlapping wrapped fire-resistant isinglass belt is made outside cable conductor, the outer directly extruded insulation layer of flame retardant coating forms cable core, in this version, though mica tape is the preferred material of fire-resisting cable, the non-constant of the mechanical strength of mica tape very easily causes the mica tape fragmentation in wrapped process, even fracture, so conveniently lose fire-resistant effect.

Summary of the invention:

For overcoming the defective of prior art, the purpose of this utility model is to provide a kind of environment-friendly type fire-resisting cable of new construction, and its flame retardant coating has higher mechanical strength, can be widely used in that the crowd is dense and field such as important military installations.

The utility model technical solution problem adopts following technical scheme:

The environment-friendly type fire-resisting cable, close by many core bundles and to form cable core, be provided with packed layer in the cable core gap, the cable core outermost layer is a restrictive coating, described core is by conductor, the wrapped flame retardant coating that forms on conductor of fire-resistant isinglass belt and be in the outer field insulating barrier of core and constitute, overcoat with the wrapped formation of high temperature flame-proof glass cloth is set outside described flame retardant coating, described insulating barrier extrudes outside overcoat, described cable core is outside equipped with the lapping layer that forms with high temperature flame-proof glass cloth, and described restrictive coating extrudes on described lapping layer.

Described insulating barrier and restrictive coating are made by the low-smoke halogen-free polyolefin material.

Compared with the prior art, the beneficial effects of the utility model are embodied in:

Because the outer overlapping wrapped natural fire-resistant isinglass belt of cable conductor, add the protection of high temperature flame-proof glass cloth, can prevent effectively that flame retardant coating is injury-free, improved the mechanical performance of flame retardant coating greatly, therefore can guarantee that cable is when burning takes place, still can guarantee circuit normal operation and continuation transmission of electric energy in certain hour, in case in breaking out of fire, can give to withdraw to bring valuable time is provided with fire-fighting, overcome general cable and when breaking out of fire, can give to withdraw and bring very big obstruction with fire-fighting work, eliminated the crowd is dense and the field of important military installations etc. in the defective that common cable had used have epoch making significance for promoting entire society's expanding economy.

Description of drawings:

Fig. 1 is a structural representation of the present utility model.

Number in the figure: 1 conductor, 2 flame retardant coatings, 3 overcoats, 4 insulating barriers, 5 packed layers, 6 lapping layers, 7 restrictive coatings.

Below pass through embodiment, and the utility model is described in further detail in conjunction with the accompanying drawings.

Embodiment,

Non-limiting examples is as described below:

Embodiment: shown in Figure 1, the described environment-friendly type fire-resisting cable of present embodiment, close by many core bundles and to form cable core, be provided with packed layer 5 in the cable core gap, packing material adopts the low smoke and zero halogen material, the temperature resistant grade of its temperature resistant grade and insulating barrier and restrictive coating material is complementary, and filling effect is the roundness that can guarantee the cable profile.Described core from-inner-to-outer comprises successively: conductor 1, adopt anaerobic electrician round copper wire bundle strand to form; Flame retardant coating 2, adopt natural fire-resistant isinglass belt overlapping wrapped, its rate of putting up is not less than 15%, overcoat 3 adopts that high temperature flame-proof glass cloth is overlapping wrappedly to form insulating barrier 4 outside flame retardant coating, adopt the low-smoke halogen-free polyolefin extrusion molding to form, it is crosslinked to carry out x ray irradiation x after the extrusion molding insulation, and this material has certain environmental protection and fire resistance, and electrical insulation capability is better.

Shown in Figure 1, be outside equipped with lapping layer 6 at cable core and packed layer, adopt overlapping wrapped the making of high temperature flame-proof glass cloth, can play protective action to cable core, the outermost layer of cable is a restrictive coating 7, adopt the low-smoke halogen-free polyolefin extrusion molding to form, this material has certain environmental protection and fire resistance, and mechanical performance is good.

Claims

1, the environment-friendly type fire-resisting cable, close by many core bundles and to form cable core, be provided with packed layer (5) in the cable core gap, the cable core outermost layer is restrictive coating (7), described core is by conductor (1), the wrapped flame retardant coating that on conductor, forms of fire-resistant isinglass belt (2) and be in the outer field insulating barrier of core (4) and constitute, it is characterized in that, overcoat (3) with the wrapped formation of high temperature flame-proof glass cloth is set outside described flame retardant coating (2), described insulating barrier (4) extrudes outside overcoat, described cable core is outside equipped with the lapping layer (6) that forms with high temperature flame-proof glass cloth, and described restrictive coating (7) extrudes on described lapping layer.

2, environment-friendly type fire-resisting cable according to claim 1 is characterized in that, described insulating barrier (4) and restrictive coating (7) are made by the low-smoke halogen-free polyolefin material.