CN213752085U

CN213752085U - Fire-resistant electric wire

Info

Publication number: CN213752085U
Application number: CN202022436654.2U
Authority: CN
Inventors: 范林炜
Original assignee: Dongguan Weihang Wire Co ltd
Current assignee: Dongguan Weihang Wire Co ltd
Priority date: 2020-10-28
Filing date: 2020-10-28
Publication date: 2021-07-20
Anticipated expiration: 2030-10-28

Abstract

The utility model discloses a fire-resistant wire, which comprises a wire body, wherein the wire body comprises a plurality of conductors and a protective sleeve, an insulating layer is fixedly arranged on the outer surface of each conductor, a fire-resistant mica layer is fixedly arranged between each conductor and the insulating layer, an inner shielding layer is also fixedly arranged on the outer surface of each conductor, an outer shielding layer is fixedly arranged on the outer surface of each insulating layer, a polyurethane wrapping tape is fixedly wrapped on the upper surface of each outer shielding layer, an inner lining layer is fixedly arranged on the upper surface of each polyurethane wrapping tape, and an armor layer is fixedly arranged between each inner lining layer and the protective sleeve; the utility model has higher fire resistance, and short circuit fault do not occur within a certain time when the utility model is subjected to direct flame combustion; in addition, the electric wire can be ensured to effectively operate in a fire environment, and the harm to people and the pollution to the environment in the case of fire are reduced.

Description

Fire-resistant electric wire

Technical Field

The utility model relates to the technical field of electric wires, specifically a fire-resistant electric wire.

Background

Along with the development of society, people's attention is more and more aroused in the fire prevention of high-rise building, important building, for improving the fire safety level, mostly can adopt fire-retardant cable or fire-resistant cable, to the building that requires more much, for example large-scale museum can select for use magnesium oxide insulation fire prevention electric wire. The flame-retardant wire is prepared by only adding the flame retardant into the insulating material and the sheath material, so that the insulating material used by the flame-retardant cable can be burnt, once a fire disaster occurs, the so-called flame-retardant cable still can be burnt by burning bear fire, and the cable can also be punctured and the like during operation to cause the fire disaster.

SUMMERY OF THE UTILITY MODEL

In order to overcome the deficiencies of the prior art, the utility model provides a fire-resistant electric wire can the effectual problem that the solution background art provided.

The utility model provides a technical scheme that its technical problem adopted is:

the utility model provides a fire-resistant electric wire, includes the electric wire body, the electric wire body includes a plurality of conductors and protective sheath, conductor external surface fixation is provided with the insulating layer, the fixed fire-resistant mica layer that is provided with between conductor and the insulating layer, conductor external surface still fixed be provided with internal shield layer and insulating layer external surface fixation and be provided with the external shielding layer, external shielding layer upper surface fixation winds the package and has polyurethane around the band, polyurethane winds the band upper surface fixation and is provided with the inner liner, the fixed armor that is provided with between inner liner and the protective sheath.

By way of further illustration, the conductor is formed by regularly and concentrically twisting a plurality of soft round copper wires with the same diameter in a layered mode.

By way of further illustration, the plurality of conductors are fixedly filled with an alkali-free fiberglass yarn filling layer therebetween.

As a further illustration, the insulating layer is an XLPE (cross linked polyethylene) insulating layer, and the armor layer is a steel tape armor layer.

As a further elaboration, the protective sheath is low smoke and zero halogen protective sheath, the fixed coating of protective sheath surface has the fire protection coating.

As a further explanation, an oxygen isolation layer is fixedly arranged between the polyurethane wrapping tape and the inner liner layer.

As a further elaboration, the thickness of the insulating layer is 1.1-1.5 mm, and the thickness of the protective sleeve is 2.6-3.2 mm.

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

the utility model has higher fire resistance, and short circuit fault do not occur within a certain time when the utility model is subjected to direct flame combustion;

the utility model discloses have excellent insulating properties and mechanical properties, when the conflagration breaing out, can not release the dense cigarette that hinders the vision and the toxic gas that causes the people to suffocate, do not have the flammability, can restrain the flame that causes through the electric wire and stretch.

Drawings

Fig. 1 is a schematic view of an overall structure of a fire-resistant electric wire according to the present invention;

fig. 2 is a top view of a fire resistant electrical wire according to the present invention;

fig. 3 is a partial enlarged view of a fire-resistant electric wire according to the present invention.

Reference numbers in the figures: 1. a wire body; 2. a conductor; 3. a protective sleeve; 4. an insulating layer; 5. a fire resistant mica layer; 6. an inner shield layer; 7. an outer shield layer; 8. polyurethane wrapping tape; 9. an inner liner layer; 10. an armor layer; 11. an alkali-free fiberglass yarn filling layer; 12. a fire-retardant coating; 13. an oxygen barrier layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-3, a fire-resistant electric wire comprises an electric wire body 1, wherein the electric wire body 1 comprises a plurality of conductors 2 and a protective sleeve 3, and the conductors 2 are formed by regularly and concentrically twisting a plurality of soft round copper wires with the same diameter in a layered manner; the thickness of the protective sleeve 3 is 2.6-3.2 mm.

The outer surface of the conductor 2 is fixedly provided with an insulating layer 4, the insulating layer 4 is an XLPE (cross linked polyethylene) insulating layer 4, and the thickness of the insulating layer 4 is 1.1-1.5 mm.

A fire-resistant mica layer 5 is fixedly arranged between the conductor 2 and the insulating layer 4, and the fire-resistant mica layer 5 has good high-temperature resistance and fire resistance and good flame-retardant effect.

The outer surface of the conductor 2 is also fixedly provided with an inner shielding layer 6, and the outer surface of the insulating layer 4 is fixedly provided with an outer shielding layer 7, the inner shielding layer and the outer shielding layer can shield electric field interference and balance an electric field, and the electric field is used for connecting a grounding wire to guarantee the passing of fault current; while ensuring that the electrically shielding layer of the insulating semiconductor 2 in contact therewith is at zero potential.

The upper surface of the outer shielding layer 7 is fixedly wrapped with a polyurethane wrapping tape 8, and the upper surface of the polyurethane wrapping tape is fixedly provided with an inner liner layer 9.

An armor layer 10 is fixedly arranged between the inner liner layer 9 and the protective sleeve 3, and the armor layer 10 is a steel belt armor layer 10; the armor layer 10 is wrapped by adopting a double-rigid-belt gap, flame can be obviously blocked and cut off, the flame is effectively prevented from directly contacting the insulating layer 4, and the overall structural strength of the electric wire is favorably enhanced.

The plurality of conductors 2 are fixedly filled with alkali-free glass fiber yarn filling layers 11, the main component of the alkali-free glass fiber yarn is silicon dioxide, the alkali-free glass fiber yarn is a very stable inorganic material, the alkali-free glass fiber yarn is non-toxic and harmless, the heat-resistant temperature can reach more than 650-; the section of the alkali-free glass fiber yarn is cylindrical, gaps are reserved among all the yarns after the yarns are filled into the yarn, a channel is formed, the channel can play a good heat dissipation role, and heat generated by the electric wire in normal operation can be dissipated through the channels and the alkali-free glass fiber yarn; the heat conducted from outside in case of fire can be conducted out through the channels and the alkali-free glass fiber yarns.

The protective sleeve 3 is a low-smoke halogen-free protective sleeve 3, the fireproof coating 12 is fixedly coated on the outer surface of the protective sleeve 3, the low-smoke halogen-free protective sleeve 3 enables the fire resistance of the electric wire to be better, and the electric wire is low-smoke halogen-free and nontoxic, so that the generation of toxic smoke can be effectively reduced when a fire disaster occurs, and the possibility of the survival of people in the fire disaster is improved; the fire-retardant coating 12 has excellent fire-retardant properties, and can prevent a fire from rapidly spreading toward the armor 10, thereby improving the fire resistance of the electric wire.

Polyurethane is fixed to be provided with around between band 8 and the inner liner 9 and separates oxygen layer 13, separates oxygen layer 13 under the conflagration condition, forms hard armour body after the ablation, and the section can generate compact even micropore pottery, and the crust is fast, and the casing is hard, closely knit, can play very good separate oxygen, thermal-insulated, keep off the fire effect, has good guard action to the electric wire.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A fire resistant electrical wire, characterized by: the electric wire comprises an electric wire body, the electric wire body includes a plurality of conductors and protective sheath, conductor external surface is fixed and is provided with the insulating layer, the fixed fire resistant mica layer that is provided with between conductor and the insulating layer, the conductor external surface is still fixed and is provided with internal shield layer and insulating layer external surface fixed and is provided with the external shielding layer, external shielding layer upper surface is fixed around having polyurethane to wind the package area, polyurethane is provided with the inner liner around package area upper surface fixed, the fixed armor that is provided with between inner liner and the protective sheath.

2. A fire resistant electrical wire as defined in claim 1, wherein: the conductor is formed by regularly and concentrically twisting a plurality of soft round copper wires with the same diameter in a layered manner.

3. A fire resistant electrical wire as defined in claim 1, wherein: and alkali-free glass fiber yarn filling layers are fixedly filled between the conductors and the insulating layer.

4. A fire resistant electrical wire as defined in claim 1, wherein: the insulating layer is an XLPE (cross linked polyethylene) insulating layer, and the armor layer is a steel belt armor layer.

5. A fire resistant electrical wire as defined in claim 1, wherein: the protective sheath is low smoke and zero halogen protective sheath, the fixed coating of protective sheath surface has fire protection coating.

6. A fire resistant electrical wire as defined in claim 1, wherein: an oxygen isolation layer is fixedly arranged between the polyurethane wrapping tape and the inner liner layer.

7. A fire resistant electrical wire as defined in claim 1, wherein: the thickness of insulating layer is 1.1 ~ 1.5mm, the thickness of protective sheath is 2.6 ~ 3.2 mm.