CN206098039U - Steamed low cigarette power cable of fire -resistant nothing - Google Patents

Abstract

The utility model discloses a fire-resistant, halogen-free, low-smoke power cable, which relates to an electrical device, comprising a radiation-resistant flame-retardant outer sheath, a water-blocking polyester layer and a radiation-resistant flame-retardant outer sheath sequentially arranged in the sheath. armor layer; the armor layer is provided with a plurality of wire cores, and the armor layer is also filled with an oxygen barrier; the oxygen barrier is provided with a plurality of bearing carriers; the core includes a conductor and The refractory layer, insulating layer and shielding layer are covered in turn on the outside of the conductor, and the conductor is a flexible conductor formed by twisting multiple copper wires. The utility model has the characteristics of radiation resistance, good fireproof performance, good fire-resistant and flame-retardant effect, good moisture-proof effect, etc., which can prevent fire from further spreading through the cable and ensure the safety of personnel and property.

Description

A fire-resistant halogen-free low-smoke power cable

technical field

The utility model relates to an electrical device, in particular to a fire-resistant, halogen-free and low-smoke power cable.

Background technique

At present, the cables sold on the market include low-smoke and halogen-free power cables, ant-proof or rodent-proof power cables, waterproof power cables, flame-retardant power cables, fire-resistant power cables, flame-retardant and fire-resistant power cables, etc. The main safety performance of these cables Monotonous, unable to meet the needs of two or more safety performances; light rail subways, nuclear industry, airports, stations, offshore platforms, hospitals, office buildings and other public places with relatively concentrated personnel and important areas of industrial and mining enterprises require cables to have high environmental performance. At the same time, these areas are also places where termites or rats are rampant, and the cables are required to have ant-proof performance. In places where people are concentrated, it is also required that the cables can be guaranteed to run for a period of time when a fire breaks out, so that people have enough time to escape. There is more or less water or water vapor, and the cable is required to have good water resistance. Therefore, the cable with a single safety performance used in the above places cannot guarantee safe operation.

Utility model content

The purpose of this utility model is to provide a fire-resistant halogen-free low-smoke power cable to solve the above problems.

In order to achieve the purpose of this utility model, the technical solution adopted is: a fire-resistant, halogen-free and low-smoke power cable, including a radiation-resistant flame-retardant outer sheath, and a water-blocking polyester sheath sequentially arranged in the radiation-resistant flame-retardant outer sheath layer and armor layer; the armor layer is provided with a plurality of wire cores, and the armor layer is also filled with an oxygen barrier; the oxygen barrier is provided with a plurality of bearing carriers; the core includes The conductor and the refractory layer, insulating layer and shielding layer covered in turn on the conductor, and the conductor is a soft conductor formed by twisting multiple copper wires.

Further, the armor layer is formed by interstitial winding of a non-magnetic conductive steel tape, and the oxygen barrier is a glass cloth tape.

Further, the load-bearing carriers are evenly distributed, and the load-bearing carriers are carbon fiber rods.

Further, the refractory layer is a basalt fiber layer, and the insulating layer is an irradiation cross-linked polyhydrocarbon halogen-free insulating material.

Further, the shielding layer includes an insulating shielding layer and a metal shielding layer, and the insulating shielding layer is located inside the metal shielding layer.

Further, the conductor is in a circular, fan-shaped or tile-shaped structure.

The beneficial effects of the utility model are,

1. The radiation-resistant and flame-retardant outer sheath used in this utility model is made of polymer-modified low-smoke and halogen-free radiation-crosslinked polyolefin composite material subjected to X-ray irradiation treatment, and the polyolefin composite material subjected to X-ray irradiation After cross-linking, the original vertical molecular structure is changed into a network molecular structure, which effectively improves the insulation strength of the overall cable, and its overall physical, mechanical and electrical properties are also improved, which can eliminate insulation caused by long-term power supply and heat generation. The disadvantages of aging greatly enhance the environmental protection and fireproof performance of the outer sheath layer.

2. The water-blocking polyester layer can prevent the cable from infiltrating into the conductor when the cable encounters water, which will cause the cable to leak electricity. At the same time, it can prevent the cable from getting wet, improve the water resistance of the cable, and improve the use of the cable. performance.

3. The armor layer can effectively improve the tensile performance of the cable, and has good sealing performance, and the armor layer is wound with a non-magnetic steel tape gap, which can effectively prevent the damage of mice and termites; at the same time, the armor layer combined with the armor The oxygen barrier filled in the coating can effectively prevent the outer flame from igniting the wire core in the armor layer, improve the flame retardant performance of the cable, and improve the safe use performance of the wire core.

4. The load-bearing carrier can not only improve the tensile resistance of the cable, but also improve the compression resistance of the cable, which can effectively prevent the cable from breaking when it is squeezed by gravity, and improve the strength of the cable; while the insulating layer adopts radiation cross-linking Polyhydrocarbon halogen-free insulating material, high temperature resistance, high wear resistance, and easy processing.

Description of drawings

Fig. 1 is a structural diagram of the refractory halogen-free low-smoke power cable provided by the utility model;

Marks and corresponding component names in the attached drawings:

1. Radiation-resistant flame-retardant outer sheath, 2. Water-blocking polyester layer, 3. Armor layer, 4. Wire core, 5. Oxygen barrier, 6. Bearing carrier, 7. Conductor, 8. Insulation layer , 9, shielding layer, 10, refractory layer.

detailed description

The utility model will be described in further detail below through specific implementation examples and in conjunction with the accompanying drawings.

Figure 1 shows a fire-resistant halogen-free low-smoke power cable provided by the utility model, which includes a radiation-resistant flame-retardant outer sheath 1, and water-blocking polyester that is sequentially arranged in the radiation-resistant flame-retardant outer sheath 1 Layer 2 and armor layer 3 not only have the effect of radiation resistance, but also have the effect of flame retardancy, improve the fire resistance of the cable, and improve the service life of the cable, while the water-blocking polyester layer 2 can effectively prevent moisture, and the use effect Better; the armor layer 3 is provided with a plurality of wire cores 4, at least two wire cores 4, and the armor layer 3 is also filled with an oxygen barrier 5, which is convenient for isolating the outside world when a fire occurs Oxygen prevents the wire core 4 from burning, so that the wire core 4 is protected by multiple layers, and the fire resistance of the wire core 4 is improved; multiple load-bearing carriers 6 are arranged in the oxygen barrier 5, and the load-bearing carriers 6 The number is at least consistent with the number of wire cores 4, and the load-bearing carrier 6 is arranged along the axial direction of the wire core 4, and the cross-section of the load-bearing carrier 6 is circular; the wire core 4 includes a conductor 7 and is coated on the conductor 7 in turn. The refractory layer 10, the insulating layer 8 and the shielding layer 9, and the conductor 7 are soft conductors formed by twisting a plurality of copper wires, and the use of soft conductors is mainly to improve the ductility of the cable.

The armor layer 3 is formed by interstitial winding of non-magnetic conductive steel tape, which makes the structure of the cable more stable and can effectively prevent the damage of rats and termites. The oxygen barrier 5 is wrapped with glass cloth, which is light in weight and convenient for the later stage of the cable Easy handling, and low cost of raw materials, so that the processing cost of the entire cable has been reduced.

The plurality of load-bearing carriers 6 are evenly distributed, and the load-bearing carriers 6 are carbon fiber rods, so that the load-bearing carriers 6 can absorb the forces received in multiple directions. At the same time, the carbon fiber rods have light weight, high temperature resistance, aging resistance, and The feature of high impact improves the practicability of the cable and facilitates the use of the cable.

The refractory layer 10 is a basalt fiber layer. The basalt fiber layer not only has good mechanical properties, but also has high heat resistance. The insulating layer 8 is an irradiation cross-linked polyhydrocarbon halogen-free insulating material, so that the insulating layer 8 A layer of air film is formed, and the air film covers the side surface of the insulating layer, which can effectively isolate air and heat, and can play the role of covering.

The shielding layer 9 includes an insulating shielding layer and a metal shielding layer. The insulating shielding layer is located inside the metal shielding layer and can provide double-layer protection so that the wire core 4 can be better protected. The conductor 7 has a circular, fan-shaped or tile-shaped structure, and conductors of different shapes can be selected according to different requirements, and the scope of application is wider.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (6)

1. A fire-resistant, halogen-free, low-smoke power cable, characterized in that: it includes a radiation-resistant flame-retardant outer sheath, and a water-blocking polyester layer and an armored layer are sequentially arranged in the radiation-resistant flame-retardant outer sheath; A plurality of wire cores are arranged in the armor layer, and an oxygen barrier is also filled in the armor layer; a plurality of load-bearing carriers are arranged in the oxygen barrier; the wire core includes a conductor and is sequentially coated on the conductor The outer refractory layer, insulating layer and shielding layer, and the conductor is a flexible conductor made of multiple copper wires twisted. 2. The fire-resistant, halogen-free, low-smoke power cable according to claim 1, wherein the armor layer is formed by winding a non-magnetic steel tape in gaps, and the oxygen barrier is a glass cloth tape. 3. The fire-resistant, halogen-free, low-smoke power cable according to claim 1, wherein the load-bearing carriers are evenly distributed, and the load-bearing carriers are carbon fiber rods. 4. The refractory, halogen-free and low-smoke power cable according to claim 1, wherein the refractory layer is a basalt fiber layer, and the insulating layer is an irradiation cross-linked polyhydrocarbon halogen-free insulating material. 5. The fire-resistant halogen-free low-smoke power cable according to claim 1, wherein the shielding layer comprises an insulating shielding layer and a metal shielding layer, and the insulating shielding layer is located inside the metal shielding layer. 6. The fire-resistant, halogen-free and low-smoke power cable according to claim 1, wherein the conductor is in a circular, fan-shaped or tile-shaped structure.