CN205177472U - Environment -friendly fireproof cable - Google Patents

Abstract

The utility model relates to the technical field of electric wires and cables, in particular to an environment-friendly fireproof cable. An environment-friendly fireproof cable, comprising a cable inner core, an outer protective layer is provided outside the cable inner core, the cable inner core includes a conductor core, the conductor core is covered with an insulating layer to form an insulated core, and the insulated core is wrapped with a The packaging method is provided with at least two inner flame-retardant layers, an isolation layer is arranged outside the inner flame-retardant layer, and a fire-proof layer is arranged outside the isolation layer. Due to the adoption of the above technical scheme, the utility model has the characteristics of colorless, odorless, non-toxic, smokeless, high and low temperature resistance, weathering and aging resistance, environmental protection, etc. when burning, and can effectively prevent the damage of the flame to the cable and keep the cable in the flame burning state. normal operation for a certain period of time. Make said cable fire rated to CWZ and GB of BS6387? Class A of 12666.6, low cost and high safety factor.

Description

An environmentally friendly fireproof cable

technical field

The utility model relates to the technical field of electric wires and cables, in particular to an environment-friendly fireproof cable.

Background technique

According to statistics, about 60% of fire accidents are caused by electrical faults. As people's understanding of the danger of fire caused by wire and cable problems continues to deepen, the performance requirements for fire and flame retardancy of wire and cable are also gradually increasing. In the event of a fire, fire-fighting elevators, fire-fighting pumps and other fire-fighting equipment need to maintain normal operation for a certain period of time. Therefore, the wires and cables that undertake the power transmission function of these equipment need to have high fire-resistant and heat-resistant performance. Regardless of whether it is fire-fighting equipment or wires and cables at the fire scene, if a large amount of toxic and harmful gases are produced after burning, it is easy to cause secondary hazards and pollution. The general fire-resistant cable is mainly wrapped with mica tape on the conductor, which is composed of flame-retardant filling, flame-retardant tape and flame-retardant sheath. The fire-resistant performance is limited, and it cannot meet the higher requirements for fire-proof and explosion-proof applications.

Utility model content

The purpose of the utility model is to provide an environment-friendly fireproof cable to solve the above technical problems.

The technical problem solved by the utility model can be realized by adopting the following technical solutions:

An environment-friendly fireproof cable, comprising a cable inner core, an outer sheath is provided outside the cable inner core, and it is characterized in that the cable inner core includes a conductor core, and the conductor core is covered with an insulating layer Finally, an insulated wire core is formed, and the insulated wire core is provided with at least two inner flame-retardant layers in a wrapping manner, the inner flame-retardant layer is provided with an isolation layer, and the isolation layer is provided with a fire-proof layer.

The conductor core is a conductor core formed by twisting multiple strands of copper wires.

The inner flame retardant layer is made of flame retardant tape.

The insulating layer is made of inorganic mineral material and wrapped around the conductor core.

An isolation layer is arranged between the inner flame-retardant layer and the fire-proof layer in an extruded manner.

The isolation layer adopts an isolation layer with ridges, and the ridges are evenly distributed on the isolation layer in 5 or 6 equal parts.

The isolation layer is made of environment-friendly high polymer, preferably cross-linked polyethylene.

The isolation layer is provided with a mesh-like frame, the frame is made of metal wire or fiber wire, and the frame is arranged between the isolation layer and the fireproof layer.

The fire-proof layer is made of inorganic mineral composite nanomaterials and then arranged outside the isolation layer by extrusion. The inorganic mineral composite nanomaterials are inorganic mineral fire-resistant and flame-retardant materials, nano-inorganic additives, inorganic binders, The material made by mixing inorganic mineral fillers, wherein the inorganic mineral fire-resistant and flame-retardant material adopts aluminum hydroxide, magnesium hydroxide or a mixture of the two.

The inorganic mineral composite nano-fireproof layer material selected by the utility model has the characteristics of colorless, odorless, smokeless, non-toxic, and does not produce dripping substances. The softness and firmness of the three-dimensional architecture material. Inorganic adhesive is a kind of high-temperature resistant inorganic nanocomposite water-based inorganic adhesive made by polycondensation reaction of inorganic nanomaterials. Through the screening of composition ratio and preparation process parameters, it not only has strong adhesive force but also has excellent fire resistance. It can maintain good non-corrosion, fire resistance and adhesive properties at high temperatures of 1800 °C.

The fireproof layer and the framework are combined into an integral structure, and the compounded integral structure is covered on the isolation layer.

The outer protective layer is made of halogen-free low-smoke flame-retardant polyolefin and then arranged outside the fire-proof layer by extrusion.

An outer flame retardant layer made of glass fiber is arranged between the outer protective layer and the fireproof layer.

The inner core of the cable includes at least two insulated wire cores, any one of the insulated wire cores is composed of a conductor core covered with an insulating layer, and at least two of the insulated wire cores are in the form of After being arranged in a bundle, the inner flame-retardant layer and the isolation layer are arranged in sequence outside it, and a filling layer is formed by filling inorganic minerals between the insulating layer of any one of the insulated wire cores and the inner flame-retardant layer , the fireproof layer is arranged outside the isolation layer, and the outer flame retardant layer and the outer protective layer are arranged outside the fireproof layer.

The filling layer adopts a mineral filling layer composed of mineral ropes.

The mineral rope includes a rope matrix, and the rope matrix is twisted with mineral fibers.

Preferably, the cable inner core includes four insulated wire cores, any one of the insulated wire cores is composed of a conductor core covered with an insulating layer, and the four insulated wire cores After being arranged in bundles, the inner flame retardant layer and the isolation layer are sequentially arranged outside it, and the filling between the insulating layer of any one of the insulated wire cores and the inner flame retardant layer is formed by filling inorganic minerals. layer, the insulation layer is provided with the fireproof layer, and the fireproof layer is provided with the outer flame retardant layer and the outer protective layer.

Beneficial effects: due to the adoption of the above technical scheme, the utility model uses the fireproof layer made of inorganic mineral composite nanomaterials as the main protective layer of the cable, and is effectively combined with the environmental protection isolation layer with protruding ridges, and has colorless, odorless, Non-toxic, smokeless, high and low temperature resistance, weather aging resistance, environmental protection and other characteristics, can effectively prevent the damage of the flame to the cable, and keep the normal operation of the cable for a certain period of time under the condition of flame burning. The fireproof grade of the cable can reach the CWZ of BS6387 and the A grade of GB12666.6, and the manufacturing cost is low and the safety factor is high.

Description of drawings

Fig. 1 is a kind of structural representation of the utility model;

Fig. 2 is another structural schematic diagram of the utility model.

detailed description

In order to make the technical means, creative features, goals and effects achieved by the utility model easy to understand, the utility model will be further elaborated below in conjunction with specific diagrams.

Referring to Fig. 1 and Fig. 2, an environment-friendly fireproof cable includes a cable inner core, an outer sheath is provided on the outside of the cable inner core, and the cable inner core includes a conductor core 1 formed by twisting multiple strands of copper wires. The insulation layer 2 made of inorganic mineral material forms an insulated wire core, and an inner flame retardant layer 4 made of a flame retardant tape is provided outside the insulated wire core in a wrapping manner. The inner flame retardant layer 4 is provided with an isolation layer 7 made of an environmentally friendly polymer, and the isolation layer 7 is provided with ridges, and the ridges are evenly distributed on the isolation layer 7 in 5 or 6 equal parts. The isolation layer 7 is provided with a fireproof layer 8 , the fireproof layer 8 is provided with an outer flame retardant layer 9 , and the outer flame retardant layer 9 is provided with an outer protective layer 10 .

The fireproof layer 8 is made of inorganic mineral composite nanomaterials and then extruded on the ridges of the isolation layer 7 . Inorganic mineral composite nanomaterials are materials made by mixing inorganic mineral fire-resistant and flame-retardant materials, nano-inorganic additives, inorganic binders, and inorganic mineral fillers. Among them, the inorganic mineral fire-resistant and flame-retardant materials are made of aluminum hydroxide, magnesium hydroxide or A mixture of both. The isolation layer 7 is preferably made of cross-linked polyethylene. The isolation layer 7 is also provided with a skeleton of mesh structure, and the skeleton is made of metal wire or fiber wire, and the fireproof layer 8 and the skeleton are composited into one structure and then coated on the isolation layer 7 . The outer flame-retardant layer 9 is made of glass fiber, and the outer sheath 10 is made of halogen-free low-smoke flame-retardant polyolefin and arranged outside the fire-resistant layer 8 by extruding.

The inner core of the cable includes at least two insulated wire cores, any insulated wire core is composed of a conductor core 1 covered with an insulating layer 2, and at least two insulated wire cores are arranged in a bundle, and then the internal resistance is sequentially set outside it. Flame layer 4 and isolation layer 7, between the insulation layer 2 of any insulated wire core and the inner flame retardant layer 4, the filling layer 5 is formed by filling inorganic minerals, the isolation layer 7 is provided with a fireproof layer 8, and the outer layer of the fireproof layer 8 is sequentially An outer flame retardant layer 9 and an outer sheath 10 are provided. The filling layer adopts a mineral filling layer composed of mineral ropes. The mineral rope includes a rope matrix twisted with mineral fibers.

As shown in Figure 2, it is the case that the cable inner core in the utility model includes four insulated wire cores. After the cores are arranged in bundles, the inner flame-retardant layer 4 and the isolation layer 7 are sequentially arranged on the outside, and the filling layer 5 is formed by filling inorganic minerals between the insulating layer 2 and the inner flame-retardant layer 4 of any insulated wire core. A fireproof layer 8 is arranged outside the isolation layer 7, and an outer flame retardant layer 9 and an outer protective layer 10 are arranged outside the fireproof layer in sequence.

The above content shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (10)

1. An environment-friendly fireproof cable, comprising a cable inner core, an outer sheath is provided outside the cable inner core, it is characterized in that the cable inner core comprises a conductor core, and the conductor core is covered with a An insulated wire core is formed behind the insulating layer, and at least two layers of inner flame-retardant layers are arranged outside the insulated wire core in a wrapping manner, and an isolation layer is arranged outside the inner flame-retardant layer, and a fire-proof layer is arranged outside the isolation layer . 2. An environment-friendly fireproof cable according to claim 1, characterized in that, the conductor core is a conductor core made of twisted copper wires, and the inner flame-retardant layer is made of flame-retardant tape The inner flame retardant layer is made, and the insulating layer is made of inorganic mineral material, and is wrapped around the conductor core. 3. An environment-friendly fireproof cable according to claim 2, characterized in that, an isolation layer is provided between the inner flame-retardant layer and the fire-proof layer in an extruded manner. 4. An environment-friendly fireproof cable according to claim 3, wherein the isolation layer is an isolation layer with ridges, and the ridges are evenly distributed on the isolation layer in 5 or 6 equal parts . 5. An environment-friendly fireproof cable according to claim 4, characterized in that, the isolation layer is made of an environment-friendly high polymer, and a skeleton with a mesh structure is arranged on the outside, and the skeleton is made of metal A skeleton made of silk or fiber filaments, and the skeleton is arranged between the isolation layer and the fireproof layer. 6. A kind of environment-friendly fireproof cable according to claim 5, characterized in that, the fireproof layer is made of inorganic mineral composite nano-materials and is arranged outside the isolation layer by extruding, and the inorganic mineral composite Nanomaterials are materials made of inorganic mineral fire-resistant and flame-retardant materials, nano-inorganic additives, inorganic binders, and inorganic mineral fillers. The inorganic mineral fire-resistant and flame-retardant materials are aluminum hydroxide, magnesium hydroxide or a mixture of the two ; When the fireproof layer is arranged on the outside of the isolation layer in an extruded manner, it is composited with the skeleton outside the isolation layer into an integral structure, and the composite integrated structure is covered on the isolation layer. 7. An environment-friendly fireproof cable according to claim 6, characterized in that the outer sheath is made of halogen-free low-smoke flame-retardant polyolefin and then arranged outside the fireproof layer by extrusion, and An outer flame retardant layer made of glass fiber is arranged between it and the fireproof layer. 8. A kind of environment-friendly fireproof cable according to claim 7, characterized in that, the inner core of the cable comprises at least two insulated wire cores, and any one of the insulated wire cores is composed of one of the conductor cores It is formed after the outer coating of an insulating layer, at least two of the insulated wire cores are arranged in a bundle, and then the inner flame retardant layer and the isolation layer are arranged in sequence outside it, and any of the insulated wire cores A filling layer is formed between the insulating layer and the inner flame-retardant layer by filling inorganic minerals, the fire-resistant layer is arranged outside the isolation layer, and the outer flame-retardant layer and the outer protective layer are arranged in sequence outside the fire-resistant layer. layer. 9. An environment-friendly fireproof cable according to claim 8, characterized in that the filling layer is a mineral filling layer composed of mineral ropes. 10. An environment-friendly fireproof cable according to claim 9, characterized in that, the mineral rope comprises a rope matrix, and the rope matrix is twisted with mineral fibers.