CN213070706U

CN213070706U - B1-grade flame-retardant cable

Info

Publication number: CN213070706U
Application number: CN202020997188.2U
Authority: CN
Inventors: 曾云昌
Original assignee: Chengdu Licheng Cable Co ltd
Current assignee: Chengdu Licheng Cable Co ltd
Priority date: 2020-06-03
Filing date: 2020-06-03
Publication date: 2021-04-27
Anticipated expiration: 2030-06-03

Abstract

The utility model relates to a wire and cable technical field discloses a B1 level flame retarded cable, including many cables, the cable includes cable core and parcel the internal insulation layer of cable core, the cable has heat insulating layer, external insulation layer and oversheath from inside to outside parcel, the external insulation layer includes a plurality of insulating rings of parcel from inside to outside, the insulating ring includes a plurality of banding insulators, and is a plurality of insulator ring array sets up and adjacent insulator fixed connection. The section of the insulator is arc-shaped, and the section of the outer insulating layer formed by the adjacent insulating rings in staggered arrangement is fish-scale-shaped. The heat insulation layer comprises a heat insulation shell and heat insulation filler filled in the heat insulation shell. The utility model has the advantages of soft easy laying has when better fire behavior.

Description

B1-grade flame-retardant cable

Technical Field

The utility model relates to a wire and cable technical field particularly, relates to a B1 level flame retarded cable.

Background

The cable is classified into a general cable, a flame retardant cable, and a fire resistant cable according to its own combustion characteristics. The flame-retardant cable can be divided into A, B, C, D four flame-retardant grades according to the classification of the combustion performance, the common flame-retardant cable is manufactured and molded according to the technical standard of GB/T19666-.

The new edition of civil building electrical design code stipulates: the super high-rise building should select the wire and cable with the combustion performance of B1 grade and above, the smoke toxicity of t0 grade and the combustion drop/particle grade of d0 grade; the requirements of the wire and cable with the combustion performance of B1 grade, the smoke toxicity of t1 grade and the combustion drippage/particle grade of d1 grade are required to be selected in high-rise buildings and public places with dense personnel.

The national intellectual property office discloses a utility model patent with the publication number of CN209401350U and the name of 'a B1-level power cable', the utility model discloses a B1-level power cable, wherein a wire core comprises a conductor, a fire-resistant mica tape wrapping layer and an XLPE insulating layer; the outer side of the conductor is sequentially wrapped with a fire-resistant mica tape wrapping layer and an XLPE insulating layer; it separates oxygen layer, second glass fiber area around covering, two steel band armoring layers and there is not steamed low fire-retardant polyolefin oversheath of cigarette to have set gradually first glass fiber area from inside to outside in the surrounding layer, pottery polyolefin, this utility model structure is complicated, because of having set up multilayer structure, leads to the cable to be difficult for buckling, and it is little to be not conform to communication cable requirement external diameter, and the structure is soft, the characteristics that the installation of being convenient for was laid.

The present application is made in view of this feature.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a B1 level flame retarded cable, the fire rating of this cable accords with the B2ca level requirement in European Union CPR certification regulation EN 50575, and has the advantage that soft easy laying.

The embodiment of the utility model discloses a realize through following technical scheme: the utility model provides a B1 level flame retarded cable, includes many cables, the cable includes the cable core and parcel the internal insulation layer of cable core, the cable has heat insulating layer, external insulation layer and oversheath from inside to outside parcel, the external insulation layer includes a plurality of insulating rings of parcel from inside to outside, the insulating ring includes a plurality of banding insulators, and is a plurality of insulator annular array sets up and adjacent insulator fixed connection.

Furthermore, the section of the insulator is arc-shaped, the section of the outer insulating layer formed by the staggered arrangement of the adjacent insulating rings is in a fish scale shape, and the fish scale structure enables the cable to have better pressure resistance.

Furthermore, the heat insulation layer comprises a heat insulation shell and heat insulation filler filled in the heat insulation shell.

Furthermore, a plurality of gap parts with circular or elliptical cross sections are arranged in the heat-insulating shell.

Furthermore, a glass fiber tape wrapping layer is arranged between the outer sheath and the outer insulating layer, so that the flame-retardant effect is better.

Specifically, the insulator is made of a halogen-free low-smoke material, so that the insulator is good in environmental protection performance, non-toxic and low-smoke; the cable is soft, and it is convenient to lay, has significantly reduced the degree of difficulty in the installation.

Specifically, the outer sheath and the heat-insulating shell are both made of ceramic polyolefin oxygen-insulating materials, and the ceramic polyolefin oxygen-insulating layer forms ceramic after combustion, so that oxygen can be effectively isolated; the heat insulation filler is made of asbestos, and the asbestos has high fire resistance, electric insulation and heat insulation and can effectively isolate the temperature, so that the temperature in the heat insulation layer is not too high.

The utility model has the advantages that:

(1) the utility model discloses a set up the oversheath and guaranteed the fire-retardant ability of cable with the heat insulating layer, oversheath and lagging casing separate the oxygen material by the pottery polyolefin and make, pottery polyolefin separates the oxygen layer and forms ceramic-ization after the burning, effectively isolated oxygen gets into outer insulating layer or cable, the cable is when receiving flame impact, oversheath and lagging casing can expand rapidly and the sintering forms the hard casing of one deck, thereby protect cable internal insulation and combustible substance, inside temperature can not be too high when making the cable burning, and then reach fire-retardant thermal-insulated efficiency.

(2) The utility model discloses a flexibility that sets up the outer insulation layer and has improved the cable, through a plurality of insulators that set up in turn, make the cable more easily buckle, have better pliability, the insulator sets up the mode that constitutes the fish scale shape in turn simultaneously and makes the cable have better crushing resistance, has improved the mechanical properties of cable, and the insulator adopts the low cigarette material of halogen-free, environmental protection performance is good, nontoxic low cigarette; the cable is soft, and it is convenient to lay, has significantly reduced the degree of difficulty in the installation.

(3) The utility model discloses a set up the pliability that the space portion further improved the cable in lagging casing for the heat insulating layer is changed and is buckled, difficult rupture.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic cross-sectional view of the present invention;

fig. 2 is a schematic cross-sectional view of the outer insulating layer in the present invention.

Icon: 11-a cable core; 12-an inner insulating layer; 2-heat insulation layer; 21-heat preservation shell; 22-heat preservation filling material; 23-a void; 31-an insulator; 4-an outer sheath; 5-glass fiber tape wrapping layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "substantially", and the like are intended to indicate that the relative terms are not necessarily strictly required, but may have some deviation. For example: "substantially equal" does not mean absolute equality, but it is difficult to achieve absolute equality in actual production and operation, and certain deviations generally exist. Thus, in addition to absolute equality, "substantially equal" also includes the above-described case where there is some deviation. In this case, unless otherwise specified, terms such as "substantially", and the like are used in a similar manner to those described above.

Examples

Referring to fig. 1 and 2, the present embodiment provides a B1-grade flame retardant cable, including a plurality of cables, a thermal insulation layer 2, an outer insulation layer, a glass fiber tape wrapping layer 5, and an outer sheath 4; the cable comprises a cable core 11 and an inner insulating layer 12 wrapping the cable core 11, and is wrapped with a heat insulating layer 2, an outer insulating layer, a glass fiber tape wrapping layer 5 and an outer sheath 4 from inside to outside; the outer insulating layer comprises a plurality of insulating rings wrapped from inside to outside, each insulating ring comprises a plurality of strip-shaped insulators 31, specifically, the section of each insulator 31 is arc-shaped, the insulators 31 in the same insulating ring are arranged in an annular array and fixedly connected with the adjacent insulators 31, the section of each outer insulating layer formed by the adjacent insulating rings in a staggered mode is fish-shaped, the outer insulating layer is formed by connecting the strip-shaped insulators 31, so that the cable is more bent and has better flexibility, convenience is provided for wiring and laying of the cable, and meanwhile, the cable has better compression resistance due to the fish scale shape formed by the alternate arrangement of the insulating rings, the mechanical performance of the cable is improved, and the cable is not easy to break and break; specifically, the number of the insulating rings should be between 2 and 5, so as to meet the requirements of small outer diameter and flexible structure of the cable.

As shown in fig. 1, the thermal insulation layer 2 includes a thermal insulation casing 21 and thermal insulation filler 22 filled in the thermal insulation casing 21. The outer sheath 4 and the heat insulation shell 21 are both made of ceramic polyolefin oxygen insulation materials, the ceramic polyolefin oxygen insulation layers are ceramic after combustion, oxygen is effectively prevented from entering the outer insulation layers or cables, the heat insulation filler 22 is made of asbestos, and the asbestos has high fire resistance, electric insulation and heat insulation and can effectively isolate temperature, so that the temperature in the heat insulation layer 2 is not too high, and the cables are protected. A plurality of gap portions 23 with circular or oval cross sections are further arranged in the heat insulation shell 21, and the gap portions 23 enable the heat insulation layer 2 to still have good flexibility, so that the cable is easy to bend, and raw materials are saved.

Preferably, as shown in fig. 1, a glass fiber tape wrapping layer 5 is further arranged between the outer insulating layer and the outer sheath 4, and the glass fiber tape wrapping layer 5 is made of alkali-free glass fiber mesh cloth, so that the cable has a good flame retardant effect, and the flame retardant capability of the cable is further increased.

Specifically, the insulator 31 is made of a halogen-free low-smoke material, and the halogen-free low-smoke material has good environmental protection performance, no toxicity and low smoke; the cable is soft and convenient to lay, and the difficulty in installation is greatly reduced.

To sum up, the utility model provides a pair of B1 level flame retarded cable has the advantage that the pliability is high, the crushing resistance is good when flame retardant efficiency is good.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a B1 level flame retarded cable, includes many cables, the cable includes cable core (11) and parcel the internal insulation layer (12) of cable core (11), its characterized in that, the cable has insulating layer (2), external insulation layer and oversheath (4) from inside to outside parcel, the external insulation layer includes a plurality of insulating collars of inside to outside parcel, the insulating collar includes a plurality of banding insulators (31), and is a plurality of insulator (31) ring array sets up and adjacent insulator (31) fixed connection.

2. The flame-retardant cable of grade B1 according to claim 1, wherein the cross-section of the insulator (31) is circular arc, and the cross-section of the outer insulating layer formed by the staggered arrangement of adjacent insulating rings is fish-scale.

3. The flame-retardant cable of grade B1 according to claim 1, wherein the thermal insulation layer (2) comprises a thermal insulation shell (21) and a thermal insulation filler (22) filled in the thermal insulation shell (21).

4. A fire-retardant cable of class B1 as claimed in claim 3, wherein a plurality of voids (23) having a circular or elliptical cross-section are provided in the heat-insulating housing (21).

5. The flame-retardant cable of B1 grade according to claim 1, wherein a glass fiber tape wrapping layer (5) is further disposed between the outer sheath (4) and the outer insulating layer.

6. A class B1 flame retardant cable according to claim 1, wherein the insulator (31) is made of a halogen free low smoke material.

7. The flame-retardant cable of grade B1 according to claim 4, wherein the outer sheath (4) and the thermal insulation shell (21) are made of ceramic polyolefin oxygen-insulating material, and the thermal insulation filler (22) is made of asbestos material.