CN215770638U

CN215770638U - Fire-resistant and flame-retardant cable for building

Info

Publication number: CN215770638U
Application number: CN202121320578.7U
Authority: CN
Inventors: 曹昕; 唐波; 余晓富; 程洪建; 杨子仪; 梁洪敏; 刘少新; 郭秋霞
Original assignee: Guangdong Zhongbao Cable Co ltd
Current assignee: Guangdong Zhongbao Cable Co ltd
Priority date: 2021-06-11
Filing date: 2021-06-11
Publication date: 2022-02-08
Anticipated expiration: 2031-06-11

Abstract

The utility model relates to the technical field of cables, and discloses a fire-resistant flame-retardant building cable which comprises a conducting wire, a fire-resistant layer, an inner insulating layer, an outer insulating layer, a first protective layer and a second protective layer which are sequentially arranged from inside to outside. Compared with the prior art, the fireproof working capacity of the cable is improved by optimizing the fireproof layer, and the life and property safety of people is guaranteed; the service life of the wire is prolonged by optimizing the insulating layer, and the wire is ensured to meet the service life (70 years) through tests; the flame retardant capability of the wire is further improved by optimizing the first protective layer, so that the wire meets the flame retardant B1 test, conforms to the No. 39 and No. 61 documents of the ministry of public Security, and meets the market development trend; the problem that the electric wire laying pipe is difficult and easy to scratch when the actual installation is used is solved through optimizing the second protective layer, convenience and economical efficiency are brought to installation and laying, and the waterproof and moistureproof effects are achieved.

Description

Fire-resistant and flame-retardant cable for building

Technical Field

The utility model relates to the technical field of cables, in particular to a fire-resistant flame-retardant building cable.

Background

With the progress of society, the living standard of people is continuously improved, the increase of the number of household appliances leads the power consumption to be rapidly increased in a violent way, and higher requirements are put forward on the load capacity of cables.

In daily life, fire accidents caused by cable combustion occur at times, and huge economic loss and casualties caused by the fire accidents cause great concern to the problems of flame retardant performance of cables, toxicity after combustion and the like in various countries in the world.

The flame-retardant cable in the market at present mainly focuses on the flame spreading height (namely the carbonization height) when the cable is burnt, and does not focus on other factors such as smoke density and smoke toxicity released when the cable is burnt, so that the environment-friendly cable which has good flame-retardant effect, low smoke, no toxicity and no harm is produced at will, the rescue work when a fire disaster happens is facilitated, and casualties and property loss can be effectively reduced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model aims to provide a fire-resistant and flame-retardant building cable which has the advantages of fire resistance, flame retardance and good using effect.

Based on the above, the utility model provides a fire-resistant and flame-retardant building cable, which comprises a conducting wire, a fire-resistant layer, an insulating layer, a first protective layer and a second protective layer, wherein the fire-resistant layer coats the conducting wire, the insulating layer coats the fire-resistant layer, the first protective layer coats the insulating layer, the second protective layer coats the first protective layer, and the conducting wire is made of a second type or a fifth type of conductor.

In some embodiments of the present application, the wires are stranded metal-coated wires.

In some embodiments of the present application, the refractory layer is a double layer synthetic mica tape.

In some embodiments of the present application, the insulating layer includes inlayer and skin, the inlayer cladding the flame retardant coating, outer cladding the inlayer, first inoxidizing coating cladding the skin, the insulating layer adopts the mode of double-deck crowded extrusion altogether to make.

In some embodiments of the present application, the first protective layer is extruded from a polyolefin oxygen barrier.

In some embodiments of the present application, the second protective layer is a nylon jacket.

The embodiment of the utility model provides a fire-resistant flame-retardant building cable, which has the following beneficial effects compared with the prior art:

the utility model provides a fire-resistant flame-retardant building cable, wherein the conductor is formed by twisting a second or fifth metal coating conductor, so that the conductivity and the structural stability of the cable can be effectively ensured, and the use safety coefficient is high; furthermore, a fire-resistant layer is coated outside the lead, a double-layer synthetic mica tape is preferably selected as the fire-resistant layer, and the overlapping lapping of the double-layer synthetic mica tape can ensure that the cable can still carry out normal power transmission at high temperature (950 ℃ -1050 ℃), so that precious time is won for fire rescue; furthermore, the insulating layer coated with the fire-resistant layer comprises an inner layer and an outer layer, and the inner-layer and outer-layer high molecular structures are changed into a three-dimensional net type from a single-chain type through double-layer co-extrusion and ultraviolet irradiation crosslinking modes, so that the aging resistance and the mechanical property of the insulating layer are greatly improved, and the ultra-long service life (70 years) of the cable under normal work is ensured; in addition, a first protective layer for coating the insulating layer is arranged outside the insulating layer, the first protective layer is made of polyolefin materials, the flame retardant strength of the first protective layer can reach B1 level, and meanwhile, the first protective layer is low-smoke and halogen-free during combustion, so that the smoke density released by the cable during combustion can be effectively reduced, the smoke generated by the cable during fire disaster is reduced, and the guarantee is provided for the life safety of people; the outermost second protective layer is made of a nylon sheath material, and has the advantages of low cost, protection against rat and termite bite, smooth and bright appearance, convenience for the use of cable tubes for buildings, good mechanical properties and excellent thermal stability. The fire-resistant flame-retardant building cable has the advantages of long service life, high fire resistance, good use effect and the like.

Drawings

Fig. 1 is a schematic structural diagram of a cable according to an embodiment of the present invention.

In the figure, 1, a lead; 2. a refractory layer; 3. an insulating layer; 31. an inner layer; 32. an outer layer; 4. a first protective layer; 5. a second protective layer.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.

It should be understood that the terms "front", "rear", and the like are used herein to describe various information, but the information should not be limited to these terms, which are used only to distinguish one type of information from another. For example, "front" information may also be referred to as "rear" information, and "rear" information may also be referred to as "front" information without departing from the scope of the present invention.

As shown in fig. 1, an embodiment of the present invention provides a fire-resistant and flame-retardant building cable, which includes a conductor 1, a fire-resistant layer 2, an insulating layer 3, a first protective layer 4, and a second protective layer 5, where the fire-resistant layer 2 covers the conductor 1, the insulating layer 3 covers the fire-resistant layer 2, the first protective layer 4 covers the insulating layer 3, and the second protective layer 5 covers the first protective layer 4.

Specifically, the lead 1 of the fire-resistant flame-retardant building cable is made of a second or fifth metal plating layer conductor, so that the conductivity and the structural stability of the cable can be effectively ensured, and the safety coefficient of use is high; further, the lead 1 is preferably formed by twisting the metal-plated lead 1, and the conductivity of the lead 1 can be further improved.

Further, in some embodiments of the application, the wire 1 is wrapped by the fire-resistant layer 2, the fire-resistant layer 2 is preferably formed by overlapping and wrapping double-layer synthetic mica tapes in a lapping way, the overlapping rate is not lower than 30%, the synthetic mica tapes are high in dielectric strength and resistivity, normal power transmission of the cable can be guaranteed at high temperature (950 ℃ -1050 ℃), and precious time is won for fire rescue.

Furthermore, in some embodiments of the present application, the insulating layer 3 covering the fire-resistant layer 2 includes an inner layer 31 and an outer layer 32, and the insulating layer 3 is made by a double-layer co-extrusion manner of the inner layer 31 and the outer layer 32, so as to ensure gapless bonding of the inner layer 32 and the outer layer 32, and avoid that impurities such as dust, moisture or gas penetrate between the inner layer 32 and the outer layer to affect the product performance during production; the volume resistivity of the inner layer 31 is large, and under the same condition, the volume resistivity is more than 1000 times larger than that of the traditional polyvinyl chloride insulating layer 3, and the outer layer 32 is made of flame-retardant materials, so that the inner layer 31 can be effectively protected from the influence of mechanical external force. The inner layer 31 and the outer layer 32 are extruded and then are irradiated and crosslinked through ultraviolet irradiation equipment, the high polymer material is converted into a three-dimensional network structure from a linear single-chain structure, and the crosslinked material is improved in various material properties, so that the service temperature of the cable is increased, and the service life of the cable is prolonged.

Furthermore, in some embodiments of the present application, the first protection layer 4 is extruded from a polyolefin oxygen barrier, and in order to ensure the flame retardant effect of the first protection layer 4, the polyolefin oxygen barrier passes a flame retardant B1 test, and compared with a common flame retardant cable, the flame retardant cable has higher requirement on combustion characteristics, and meanwhile, the polyolefin oxygen barrier has less smoke and low toxicity during combustion, and can effectively reduce casualties.

Optionally, in some embodiments of the present application, the second protective layer 5 is preferably formed by extruding a nylon sheathing material, the nylon material has characteristics of water resistance, heat resistance, wear resistance, termite resistance, rat bite resistance, and the like, and is excellent in safety performance, and in addition, the nylon material also has lubricity, so that the nylon material is not easily scratched during threading, and is convenient for threading and laying of cables.

In conclusion, the utility model provides a fire-resistant flame-retardant building cable which comprises a conducting wire, a fire-resistant layer, an inner insulating layer, an outer insulating layer, a first protective layer and a second protective layer which are sequentially arranged from inside to outside, and compared with the prior art, the fire-resistant working capacity of the cable is improved by optimizing the fire-resistant layer, and the life and property safety of people is guaranteed; the service life of the wire is prolonged by optimizing the insulating layer, and the wire is ensured to meet the service life (70 years) through tests; the flame retardant capability of the wire is further improved by optimizing the first protective layer, so that the wire meets the flame retardant B1 test, conforms to the No. 39 and No. 61 documents of the ministry of public Security, and meets the market development trend; the problem that the electric wire laying pipe is difficult and easy to scratch when the actual installation is used is solved through optimizing the second protective layer, convenience and economical efficiency are brought to installation and laying, and the waterproof and moistureproof effects are achieved.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a fire-resistant fire-retardant cable for building, its characterized in that includes wire, flame retardant coating, insulating layer, first inoxidizing coating and second inoxidizing coating, the flame retardant coating cladding the wire, the insulating layer cladding the flame retardant coating, first inoxidizing coating cladding the insulating layer, second inoxidizing coating cladding first inoxidizing coating, the wire adopts second type or fifth type conductor to make.

2. The fire-resistant and flame-retardant building cable according to claim 1, wherein the conductive wires are twisted by metal-coated conductive wires.

3. The fire-resistant, flame-retardant architectural cable of claim 1, wherein the fire-resistant layer is a double-layered synthetic mica tape.

4. The fire-resistant and flame-retardant building cable according to claim 1, wherein the insulating layer comprises an inner layer and an outer layer, the inner layer covers the fire-resistant layer, the outer layer covers the inner layer, the first protective layer covers the outer layer, and the insulating layer is manufactured by a double-layer co-extrusion method.

5. The fire resistant, flame retardant construction cable of claim 1 wherein the first protective layer is extruded from a polyolefin oxygen barrier.

6. The fire-resistant flame-retardant construction cable according to claim 1, wherein the second protective layer is a nylon sheath.