CN212434310U

CN212434310U - Fireproof cable

Info

Publication number: CN212434310U
Application number: CN202021625189.0U
Authority: CN
Inventors: 张耘
Original assignee: Jiangxi Liming Wire And Cable Co ltd
Current assignee: Jiangxi Liming Wire And Cable Co ltd
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2021-01-29
Anticipated expiration: 2030-08-07

Abstract

The utility model provides a fireproof cable, including the conductor sinle silk, the conductor sinle silk is equipped with composite insulation layer outward, be equipped with fire-retardant filling layer between conductor sinle silk and the composite insulation layer, the composite insulation layer is equipped with the shielding layer outward, the shielding layer is equipped with first flame retardant coating outward, first flame retardant coating is equipped with network structure casing ply outward, network structure casing ply is equipped with the second flame retardant coating outward, the second flame retardant coating is equipped with fire-retardant layer outward, the flame retardant coating is equipped with the restrictive coating outward. The utility model discloses a be equipped with the multichannel flame retardant coating, improved fire behavior effectively, and the fire-retardant filling layer and the fire-retardant layer that are equipped with have improved the fire behavior of cable effectively.

Description

Fireproof cable

Technical Field

The utility model relates to a cable field especially relates to a fireproof cable.

Background

It is statistically estimated that the portion due to electrical failure accounts for about 60% in the event of a fire. Along with the increasing understanding of the danger of fire caused by the problems of the electric wires and cables, the requirements for the performances of fire prevention, flame retardance and the like of the electric wires and cables are gradually improved. In case of fire, fire-fighting equipment such as fire elevators and fire pumps need to keep normal operation for a certain time, so that wires and cables for transmitting power of the equipment need to have high fireproof and heat-resistant performance. While a general fire-resistant cable only has single-layer fire protection, such as wrapping mica tapes on a conductor or filling the conductor with flame retardant, but does not have multi-layer fire protection.

SUMMERY OF THE UTILITY MODEL

In order to solve the above-mentioned background art, the general fire-resistant cable mentioned only has the individual layer fire protection, and does not possess the multilayer fire protection and a fire-resistant cable that provides.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a fireproof cable, includes the conductor sinle silk, the conductor sinle silk is equipped with composite insulation layer outward, be equipped with fire-retardant filling layer between conductor sinle silk and the composite insulation layer, the composite insulation layer is equipped with the shielding layer outward, the shielding layer is equipped with first flame retardant coating outward, first flame retardant coating is equipped with network structure casing ply outward, network structure casing ply is equipped with the second flame retardant coating outward, the second flame retardant coating is equipped with fire-retardant layer outward, fire-retardant layer is equipped with the restrictive coating outward.

Furthermore, the composite insulating layer is a crosslinked polyethylene layer, the thickness of the composite insulating layer is not less than 0.5mm, the crosslinked polyethylene is adopted to prepare the insulating layer, and the crosslinked polyethylene insulation is realized by converting a linear molecular structure of a cable insulating polyethylene molecule into a main body reticular molecular structure by a chemical method or a physical method, namely, thermoplastic polyethylene is converted into thermosetting crosslinked polyethylene, so that the heat resistance and the mechanical property of the cable insulating polyethylene are greatly improved, the contractibility of the cable insulating polyethylene is reduced, the cable insulating polyethylene is not melted after being heated, and the excellent electrical property is kept.

Furthermore, the shielding layer is an aluminum metal layer, the thickness of the shielding layer is 0.5-0.8mm, and the aluminum metal layer has the functions of shielding signals and improving the strength of the cable.

Further, the first fireproof layer is an inorganic mineral insulating layer.

Furthermore, the flame-retardant layer is a mica layer, and the mica layer is used as the flame-retardant layer of the cable so as to ensure that the cable can continue to operate within a certain time after the cable catches fire.

Further, the restrictive coating is low smoke and zero halogen fire-retardant polyolefin oversheath layer, just the thickness of restrictive coating is not less than 1.8mm, and the cable outside sets up low smoke and zero halogen fire-retardant polyolefin oversheath layer when taking place the conflagration dangerous situation, and the burning can form porous carbon shell to play thermal-insulated effect.

The utility model discloses following beneficial effect has:

1. the fireproof performance can be effectively improved by arranging the first fireproof layer and the second fireproof layer;

2. the sheath layer is a low-smoke halogen-free flame-retardant polyolefin outer sheath layer, and a porous carbon shell can be formed by combustion in case of fire hazard, so that the heat insulation effect is achieved.

3. The strength of the cable main body can be improved by the aid of the mesh-structure framework layer and the shielding layer.

4. The flame-retardant layer and the flame-retardant filling layer can further improve the flame-retardant effect.

Drawings

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

Fig. 2 is a schematic diagram of the winding structure of the conductor core of the present invention.

In the figure: 1. the cable comprises a conductor wire core, 2 parts of a composite insulating layer, 3 parts of a flame-retardant filling layer, 4 parts of a shielding layer, 5 parts of a first fireproof layer, 6 parts of a reticular structure framework layer, 7 parts of a second fireproof layer, 8 parts of a flame-retardant layer and 9 parts of a sheath layer.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

As shown in fig. 1-2, a fireproof cable comprises a conductor core 1, the conductor core 1 is formed by winding a plurality of copper cores, a composite insulating layer 2 is arranged outside the conductor core 1, the composite insulating layer 2 is a crosslinked polyethylene layer, the crosslinked polyethylene is used for preparing an insulating layer, and the crosslinked polyethylene is used for insulating by a chemical method or a physical method, so that the insulating polyethylene molecules of the cable are changed into a main body net-shaped molecular structure from a linear molecular structure, namely thermoplastic polyethylene is changed into thermosetting crosslinked polyethylene, thereby greatly improving the heat resistance and the mechanical property of the cable, reducing the contractibility of the cable, ensuring that the cable is not melted after being heated, and maintaining excellent electrical property. Therefore, the cross-linked polyethylene insulation has good superiority in the aspects of heat resistance and mechanical performance, so that the insulation layer has the performances of heat resistance, cutting resistance and the like, the thickness of the composite insulation layer 2 is not less than 0.5mm, a flame-retardant filling layer 3 is arranged between the conductor core 1 and the composite insulation layer 2, the filler in the flame-retardant filling layer 3 is a glass fiber rope, the flame retardance of the cable is effectively improved, a shielding layer 4 is arranged outside the composite insulation layer 2, the shielding layer 4 is an aluminum metal layer, the aluminum metal layer has the functions of shielding signals and improving the strength of the cable, the thickness of the shielding layer 4 is 0.5-0.8mm, a first fireproof layer 5 is arranged outside the shielding layer 4, the first fireproof layer 5 is an inorganic mineral insulation layer, the fireproof performance is effectively improved, a net-shaped framework layer 6 is arranged outside the first fireproof layer 5, and the net-shaped framework layer 6 is a cross-shaped net-shaped framework composed of metal wires or fireproof fiber wires, the strength of the cable is improved, a second fireproof layer 7 is arranged outside the framework layer 6 of the net structure, the second fireproof layer 7 is made of inorganic mineral composite nano materials, the inorganic mineral composite nano materials are made of inorganic mineral fireproof flame-retardant materials, nano inorganic auxiliary agents, inorganic binders and inorganic mineral fillers, the inorganic mineral fireproof flame-retardant materials are made of aluminum hydroxide, magnesium hydroxide or a mixture of the aluminum hydroxide and the magnesium hydroxide, a flame-retardant layer 8 is arranged outside the second fireproof layer 7, the flame-retardant layer 8 is a mica layer, the mica layer is used as the flame-retardant layer 8 of the cable to ensure that the cable can continue to operate within a certain time after being ignited, a sheath layer 9 is arranged outside the flame-retardant layer 8, the sheath layer 9 is a low-smoke halogen-free flame-retardant polyolefin outer sheath layer, and when the low-smoke halogen-free flame-retardant polyolefin outer sheath layer is arranged on the outermost side of the cable, a porous carbon, thereby playing a role of heat insulation, and the thickness of the sheath layer 9 is not less than 1.8 mm.

The utility model discloses a theory of operation is: the fireproof performance can be effectively improved by arranging the first fireproof layer 5 and the second fireproof layer 7; the sheath layer 9 is a low-smoke halogen-free flame-retardant polyolefin outer sheath layer, and a porous carbon shell can be formed by combustion in case of fire hazard, so that the heat insulation effect is achieved; the provided reticular structure framework layer 6 and the shielding layer 4 can improve the strength of the cable main body; the flame-retardant layer 8 and the flame-retardant filling layer 3 are arranged, so that the flame-retardant effect can be further improved.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A fire-resistant cable comprising a conductor core (1), characterized in that: the cable is characterized in that a composite insulating layer (2) is arranged outside the conductor wire core (1), a flame-retardant filling layer (3) is arranged between the conductor wire core (1) and the composite insulating layer (2), a shielding layer (4) is arranged outside the composite insulating layer (2), a first fireproof layer (5) is arranged outside the shielding layer (4), a net-shaped structure framework layer (6) is arranged outside the first fireproof layer (5), a second fireproof layer (7) is arranged outside the net-shaped structure framework layer (6), a flame-retardant layer (8) is arranged outside the second fireproof layer (7), and a sheath layer (9) is arranged outside the flame-retardant layer (8).

2. A fire-resistant cable according to claim 1, wherein: the composite insulating layer (2) is a crosslinked polyethylene layer, and the thickness of the composite insulating layer (2) is not less than 0.5 mm.

3. A fire-resistant cable according to claim 1, wherein: the shielding layer (4) is an aluminum metal layer, and the thickness of the shielding layer (4) is 0.5-0.8 mm.

4. A fire-resistant cable according to claim 1, wherein: the first fireproof layer (5) is an inorganic mineral insulating layer.

5. A fire-resistant cable according to claim 1, wherein: the flame-retardant layer (8) is a mica layer.

6. A fire-resistant cable according to claim 1, wherein: the sheath layer (9) is a low-smoke halogen-free flame-retardant polyolefin outer sheath layer, and the thickness of the sheath layer (9) is not less than 1.8 mm.