CN112750563A

CN112750563A - Flame-retardant fire-resistant wire and cable

Info

Publication number: CN112750563A
Application number: CN202110054257.5A
Authority: CN
Inventors: 郭莹莹; 尚爱民; 吕秀武; 王永青
Original assignee: Jiaozuo Railway Cable Co Ltd
Current assignee: Jiaozuo Railway Cable Co Ltd
Priority date: 2021-01-15
Filing date: 2021-01-15
Publication date: 2021-05-04

Abstract

The invention discloses a flame-retardant fire-resistant wire cable which comprises a cable core, a heat insulation layer, a shielding layer and a plastic sleeve, wherein the cable core, the heat insulation layer, the shielding layer and the plastic sleeve are sequentially arranged from inside to outside; the cable core is composed of an insulating wire core, and the insulating wire core sequentially comprises a conductor, a fire-resistant layer, a foaming layer and a flame-retardant outer skin from inside to outside; the fire-resistant layer is ceramic silicon rubber. According to the invention, the fire-resistant layer formed by ceramic silicon rubber is added in the insulated wire core, so that the fire-resistant grade of the exposed contact wiring part of the conductor can be well improved, the cable combustion caused by high-temperature fire at the joint is avoided, and the cable meets the fire-fighting requirement. The flame-retardant setting of further combination insulating layer, shielding layer and plastic sheath makes this product can satisfy daily fire-resistant fire-retardant demand, and the flame retardant efficiency who locates and the cable core exposes at the wiring of cable has further promoted, satisfies the safety guarantee demand of cable.

Description

Flame-retardant fire-resistant wire and cable

Technical Field

The invention relates to the technical field of wires and cables, in particular to a flame-retardant and fire-resistant wire and cable.

Background

At present, with the development of economic society, the use amount of electric wires and cables is larger and larger, the requirements of the state and the society on the electric wires and cables are higher and higher, and especially the requirements on fire safety are also continuously improved. The existing transmission signal cable insulation usually adopts non-flame-retardant materials, and only adopts flame-retardant materials on the outside, so that although the wire and cable can meet the flame-retardant requirement, the exposed part of a wire core (such as the wiring part of equipment) has great fire hazard.

Therefore, the electric wire and cable for transmitting signals is urgently needed, the insulating wire core can have a fire-resistant function, and the whole system of the electric wire and cable can meet the requirement of fire safety.

Disclosure of Invention

The invention aims to provide a flame-retardant and fire-resistant wire cable, which can adopt a flame-retardant and fire-resistant foamed insulating wire core, so that the insulating wire core can have a certain flame-retardant and fire-resistant function, and the safety coefficient of a system is improved.

The technical scheme adopted by the invention is as follows:

a flame-retardant fire-resistant wire and cable comprises a cable core, a heat insulation layer, a shielding layer and a plastic sleeve which are sequentially arranged from inside to outside; the cable core is composed of an insulating wire core, and the insulating wire core sequentially comprises a conductor, a fire-resistant layer, a foaming layer and a flame-retardant outer skin from inside to outside; the fire-resistant layer is ceramic silicon rubber.

The insulation wire cores are provided with distinguishing marks used for distinguishing the insulation wire cores.

The foaming layer is a flame-retardant polypropylene layer.

The flame-retardant outer skin is a flame-retardant polyethylene layer or a flame-retardant polypropylene layer.

And flame-retardant materials are filled in the cable core.

The heat insulation layer 5 is composed of a band coated outside the cable core or a band and an extruded plastic sleeve.

The shielding layer 6 is composed of a metal layer coated outside the cable core.

The plastic sheath 7 is a flame-retardant plastic sheath, and is a low-smoke halogen-free flame-retardant polyolefin sheath or a silicon rubber sheath.

The insulating sinle silk be a plurality of, set up in groups between a plurality of sinle silks, set up alone or transposition between each group.

The wire cores in each group of the insulated wire cores are oppositely or in star-shaped twisting arrangement.

According to the invention, the fire-resistant layer formed by ceramic silicon rubber is added in the insulated wire core, so that the fire-resistant grade of the exposed contact wiring part of the conductor can be well improved, the cable combustion caused by high-temperature fire at the joint is avoided, and the cable meets the fire-fighting requirement. The flame-retardant setting of further combination insulating layer, shielding layer and plastic sheath makes this product can satisfy daily fire-resistant fire-retardant demand, and the flame retardant efficiency who locates and the cable core exposes at the wiring of cable has further promoted, satisfies the safety guarantee demand of cable.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of an insulated wire core of the present invention.

The reference numbers illustrate: 1. An insulated wire core; 2. a four-wire set; 3. a paired line group; 4. a cable core; 5. a thermal insulation layer; 6. a shielding layer; 7. a plastic sheath; 8. a conductor; 9. A refractory layer; 10. a foamed layer; 11. and (3) a flame-retardant outer skin.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

As shown in fig. 1 and 2, the cable comprises a cable core, a heat insulation layer, a shielding layer and a plastic sleeve which are arranged in sequence from inside to outside; the cable core is composed of an insulating wire core, and the insulating wire core sequentially comprises a conductor, a fire-resistant layer, a foaming layer and a flame-retardant outer skin from inside to outside; the fire-resistant layer is ceramic silicon rubber. According to the invention, the fire-resistant layer formed by ceramic silicon rubber is added in the insulated wire core, so that the fire-resistant grade of the exposed contact wiring part of the conductor can be well improved, the cable combustion caused by high-temperature fire at the joint is avoided, and the cable meets the fire-fighting requirement.

The insulating sinle silk be a plurality of, a plurality of sinle silks can set up in groups, and independent or transposition setting between each group. When the number of the insulated wire cores is two, the two insulated wire cores are oppositely arranged in a twisted manner, and a paired wire group can be formed. When the number of the insulated wire cores is four, the four insulated wire cores are arranged in a star-shaped twisted mode, and a four-wire group can be formed. The paired groups and the four groups can be wrapped with binding wires or wrapped or extruded with plastic materials.

In practical use, the cable core 4 comprises at least 1 paired line group or one quad unit or 1 insulated wire core, and can also be formed by twisting different paired line groups or quad units or insulated wire cores in a certain sequence; or formed by twisting single wire layers. The method is used according to actual requirements.

The insulated wire cores are all provided with distinguishing marks. The distinguishing mark is a digital mark, a symbol mark or a color mark. Because many insulated wire cores strand, in order to avoid the sinle silk mistake to continue, so insulated wire core can adopt different colours to distinguish, also can adopt the number of seal outside insulated wire core to distinguish. In practical use, the four wire groups 3 can be formed by twisting 4 insulated wire cores with different colors in a star shape, and the paired wire groups 5 can be formed by twisting 2 insulated wire cores with different colors in an opposite direction. The four-line group formed by star-shaped twisting and the paired group formed by opposite twisting can be separated by winding binding wires with different colors.

The foaming layer is made of flame-retardant polypropylene materials, and is extruded outside the fire-resistant layer after physical foaming. The flame-retardant sheath is extruded from flame-retardant polyethylene or flame-retardant polypropylene. The cable core can be filled with flame retardant materials, so that the overall flame retardant coefficient of the cable is further improved. The heat insulation layer 5 is composed of a band coated outside the cable core or composed of a band and an extruded plastic sleeve.

The shielding layer 6 is formed by a metal layer coated outside the cable core, and can be made of copper, aluminum, steel strips or other alloy materials, or can be made of metal and plastic combined materials. The plastic sleeve 7 is a flame-retardant plastic sheath, can adopt a low-smoke halogen-free flame-retardant polyolefin sheath, and can also adopt flame-retardant plastic materials such as silicon rubber materials and the like.

Through the arrangement of the structure, when the product can meet daily fire-resistant and flame-retardant requirements, the flame-retardant effect at the wiring part and the cable core exposed part of the cable is further improved, and the safety guarantee requirement of the cable is met.

In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated without limiting the specific scope of protection of the present invention.

It is noted that the terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the application of the principles of the technology. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the specific embodiments described herein, and may include more effective embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A flame-retardant fire-resistant wire and cable is characterized in that: the cable comprises a cable core, a heat insulation layer, a shielding layer and a plastic sleeve which are sequentially arranged from inside to outside; the cable core is composed of an insulating wire core, and the insulating wire core sequentially comprises a conductor, a fire-resistant layer, a foaming layer and a flame-retardant outer skin from inside to outside; the fire-resistant layer is ceramic silicon rubber.

2. The flame retardant, fire resistant wire cable of claim 1, wherein: the insulation wire cores are provided with distinguishing marks used for distinguishing the insulation wire cores.

3. The flame retardant, fire resistant wire cable of claim 1, wherein: the foaming layer is a flame-retardant polypropylene layer.

4. The flame retardant, fire resistant wire cable of claim 1, wherein: the flame-retardant outer skin is a flame-retardant polyethylene layer or a flame-retardant polypropylene layer.

5. The flame retardant, fire resistant wire cable of claim 1, wherein: and flame-retardant materials are filled in the cable core.

6. The flame retardant, fire resistant wire cable of claim 1, wherein: the heat insulation layer is composed of a band coated outside the cable core or a band and an extruded plastic sleeve.

7. The flame retardant, fire resistant wire cable of claim 1, wherein: the shielding layer is composed of a metal layer coated outside the cable core.

8. The flame retardant, fire resistant wire cable of claim 1, wherein: the plastic sheath is a flame-retardant plastic sheath, and is a low-smoke halogen-free flame-retardant polyolefin sheath or a silicon rubber sheath.

9. The flame retardant, fire resistant electrical wire or cable of any one of claims 1 to 8, wherein: the insulating sinle silk be a plurality of, set up in groups between a plurality of sinle silks, set up alone or transposition between each group.

10. The flame retardant, fire resistant wire cable of claim 9, wherein: the wire cores in each group of the insulated wire cores are oppositely or in star-shaped twisting arrangement.