CN210606683U

CN210606683U - Fireproof cable

Info

Publication number: CN210606683U
Application number: CN201921550652.7U
Authority: CN
Inventors: 刘北喜; 侯少绵; 林伟江
Original assignee: Guangzhou Zhujiang Cable Co ltd
Current assignee: Guangzhou Zhujiang Cable Co ltd
Priority date: 2019-09-18
Filing date: 2019-09-18
Publication date: 2020-05-22
Anticipated expiration: 2029-09-18

Abstract

The utility model provides a fireproof cable, which comprises a wire core group and a protective layer used for wrapping the wire core group; the gap in the wire core group and the gap between the wire core group and the protective layer are filled with inorganic mineral filling layers; the wire core group comprises four wires, and the protective layer comprises a high flame-retardant belting layer, a first fireproof layer, a second fireproof layer and an outer protective layer; the utility model discloses a wrapping up mica tape insulating layer and metal covering outside the wire core and protecting the wire core, all protecting the wire core group from inside to outside in proper order for setting up high fire-retardant band layer, first flame retardant coating, second flame retardant coating and outer inoxidizing coating in the wire core group outside simultaneously, this kind adopts double-deck fireproof structure design, has strengthened the fire behavior of cable, has characteristics such as the structure is light, long service life, wide range, security performance are good simultaneously.

Description

Fireproof cable

Technical Field

The utility model relates to a wire and cable technical field, more specifically say, in particular to fireproof cable.

Background

With the acceleration of industrialization and urbanization, fire accidents of various buildings and public places also frequently occur, and huge losses of lives and properties are caused. Due to frequent use of electric power, a fire condition can occur, a general cable does not have a fire prevention function or has an unsatisfactory fire prevention effect, and normal power supply of a circuit cannot be guaranteed after a fire disaster occurs, so that various devices cannot normally work, and a serious safety problem is caused.

Therefore, the development of a cable having a fire-proof function is urgently required by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

Problem (A)

In summary, how to improve the fireproof performance of the cable becomes a technical problem to be solved at present.

(II) technical scheme

The utility model provides a fireproof cable, which comprises a wire core group and a protective layer used for wrapping the wire core group; the gap in the wire core group and the gap between the wire core group and the protective layer are filled with inorganic mineral filling layers;

the wire core group comprises four wires, each wire comprises a wire core and a shielding layer, each wire core is composed of a plurality of strands of copper wires, and the shielding layers wrap the wire cores; the shielding layer comprises a mica tape insulating layer and a metal sleeve, the mica tape insulating layer wraps the wire core, and the metal sleeve is arranged on the outer surface of the mica tape insulating layer;

the protective layer sequentially comprises a high-flame-retardant belting layer, a first fireproof layer, a second fireproof layer and an outer protective layer from the outer side surface of the wire core group to the outside.

Preferably, the outer protective layer is a halogen-free low-smoke plastic layer.

Preferably, the first fire protection layer is a ceramicized polyolefin layer.

Preferably, the second fireproof layer is a ceramic silicon rubber layer.

Preferably, the ceramic silicon rubber layer also comprises a glass fiber layer arranged on the outer side surface of the ceramic silicon rubber layer.

Preferably, the thickness of the ceramic silicon rubber layer is not less than 2 mm.

Preferably, the inorganic mineral filling layer is ceramic silica gel mud.

Preferably, the average particle size of the ceramic silica gel mud is 5-10 μm.

Preferably, the metal sleeve is an embossed copper sleeve or an embossed aluminum sleeve.

(III) advantageous effects

Through the structure design, the utility model provides an among the fireproof cable, through wrapping up mica tape insulating layer and metal covering outside the core and protecting the core, all protect the core group from inside to outside for setting up high fire-retardant band layer, first flame retardant coating, second flame retardant coating and outer inoxidizing coating in proper order outside the core group of line simultaneously, this kind adopts double-deck fireproof structure design, has strengthened the fire behavior of cable, has characteristics such as the structure is light simultaneously, long service life, the wide range, the security performance is good.

Drawings

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

in fig. 1, the correspondence between the component names and the reference numbers is:

1-wire core, 2-mica tape insulating layer, 3-metal sleeve, 4-inorganic mineral filling layer, 5-high fire-retardant belting layer, 6-first fire-proof layer, 7-second fire-proof layer and 8-external protective layer.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, the present invention provides a fireproof cable, which includes a wire core assembly and a protective layer for wrapping the wire core assembly; the gap in the wire core group and the gap between the wire core group and the protective layer are both filled with an inorganic mineral filling layer 4;

the wire core group comprises four wires, each wire comprises a wire core 1 and a shielding layer, each wire core 1 is composed of a plurality of strands of copper wires, and each shielding layer wraps the wire core 1; the shielding layer comprises a mica tape insulating layer 2 and a metal sleeve 3, the mica tape insulating layer 2 wraps the wire core 1, and the metal sleeve 3 is arranged on the outer surface of the mica tape insulating layer 2;

the protective layer comprises a high-flame-retardant belting layer 5, a first fireproof layer 6, a second fireproof layer 7 and an outer protective layer 8 from the outer side surface of the wire core group to the outside in sequence.

The utility model discloses an in the embodiment, this fireproof cable's sinle silk 1 comprises the high-quality copper stranded conductor of stranded, adopts winding mode to be provided with mica tape insulating layer in the outside of sinle silk, is provided with metal covering 3 in the 2 outsides of mica tape insulating layer, and metal covering 3 is through continuous seamless extruded mode, through drawing the shaping, has good barrier propterty, can be waterproof and prevent gnawing of mouse ant and sting, possesses resistance to compression and anti-interference effect. The wires are provided with 4 wires in total, and the gaps among the 4 wires are filled with the inorganic mineral filling layer 4. The wire core group and the inorganic mineral filling layer 4 jointly form a main structure of the cable, and a high-flame-retardant belting layer 5, a first fireproof layer 6, a second fireproof layer 7 and an outer protective layer 8 are respectively arranged on the outer side of the main body of the cable. Set up high fire-retardant band layer 5 in the outside of cable main part, high fire-retardant band layer 5 adopts the winding mode to wrap up whole sinle silk group, then crowded package fire prevention material respectively in high fire-retardant band layer 5's the outside and form first flame retardant coating 6 and the second flame retardant coating 7 that possess fire prevention function, and crowded package is had no steamed low smoke material at last and forms outer inoxidizing coating 8.

Preferably, the outer protective layer 8 is a halogen-free low-smoke plastic layer.

Preferably, the first fireproof layer 6 is a ceramic polyolefin layer, and the ceramic polyolefin fireproof material is prepared by taking polyolefin resin as a base material, adding efficient ceramic-forming filler, flame retardant and other functional additives, and carrying out mixing, plasticizing and granulating. Compared with the traditional low-smoke halogen-free material, the low-smoke halogen-free material has the advantages that: the hard ceramic hard shell can be generated under the conditions of flame burning or high temperature, the hard shell is not melted and dropped, and can resist water spraying and mechanical vibration, and the heat-insulating and fire-proof effects are very good, so that smoothness of electric power and information control under the condition of fire can be ensured, and precious time is won for people to escape and fire rescue.

Preferably, the second fireproof layer 7 is a ceramic silicon rubber layer, and the ceramic silicon rubber material can form a self-supporting ceramic body in flame, and has certain strength, thermal shock resistance and good electrical property.

Preferably, the ceramic silicon rubber layer comprises a glass fiber layer arranged on the outer side face of the ceramic silicon rubber layer, and shielding and insulating effects can be improved by arranging the glass fiber layer.

Preferably, the inorganic mineral filler layer 4 is ceramic silica gel cement.

Preferably, the metal sleeve 3 is an embossed copper sleeve or an embossed aluminum sleeve.

It should be noted that the fireproof cable of the present invention can be prepared by a common cable production process.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model provides an among the fireproof cable, through wrapping up mica tape insulating layer 2 and metal covering 3 outside the core and protecting the core, all protect the core group from inside to outside for setting up high fire-retardant band layer 5, first flame retardant coating 6, second flame retardant coating 7 and outer inoxidizing coating 8 in proper order in the core group outside simultaneously, this kind adopts double-deck fireproof structure design, has strengthened the fire behavior of cable, have characteristics such as the structure is light simultaneously, long service life, the wide range, the security performance is good.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. A fireproof cable is characterized by comprising a wire core group and a protective layer used for wrapping the wire core group; the gap in the wire core group and the gap between the wire core group and the protective layer are filled with inorganic mineral filling layers;

2. A fire-resistant cable according to claim 1, wherein said outer protective layer is a halogen-free low smoke plastic layer.

3. The fire-protected cable of claim 2, wherein the first fire-resistant layer is a ceramified polyolefin layer.

4. The fire resistant cable of claim 3 wherein said second fire resistant layer is a layer of cerammed silicone rubber.

5. The fire-protected cable of claim 4, further comprising a fiberglass layer disposed on an outer side of said layer of cerammed silicone rubber.

6. A fire-resistant cable according to claim 4, characterised in that the thickness of the layer of ceramicized silicone rubber is not less than 2 mm.

7. The fire-rated cable of claim 1, wherein the inorganic mineral filler layer is a cerammed silica gel cement.

8. The fireproof cable of claim 7, wherein the ceramic silica gel cement has an average particle size of 5-10 μm.

9. A fire protection cable according to any one of claims 1 to 8, wherein the metal sheath is an embossed copper sheath or an embossed aluminium sheath.