CN205194385U - Fireproof cable - Google Patents

Abstract

The utility model discloses a fireproof cable, which includes a protective sheath and a wire, and is characterized in that: the wire includes a conductive wire core, a neutral wire core, an inner insulating layer, an outer insulating layer, The outside of the core is successively covered and wrapped with an inner insulating layer and an outer insulating layer, and the inner insulating layer and the outer insulating layer are both made of environmentally friendly temperature-resistant and flame-retardant materials; the protective cover includes an inner protective cover and an outer protective cover, and the The inner protective sheath is covered and wrapped around the outer side of the wire, and the outer protective sheath is extruded and covered on the outer side of the inner protective sheath. Both the inner protective sheath and the outer protective sheath are made of environmentally friendly heat-resistant and flame-retardant materials; Fire-proof and high-temperature-resistant material fillers are provided between the wires and the inner protective sheath. The fireproof cable has excellent performance of temperature resistance, flame retardancy, safety and environmental protection, and can effectively prevent the fire from eroding the cable when a fire occurs, which is conducive to the safe escape and evacuation of personnel.

Description

fireproof cable

technical field

The utility model relates to a cable, in particular to a cable for high-rise buildings.

Background technique

In recent years, my country's economy has developed rapidly, and more and more high-rise buildings have been put into use. For high-rise buildings, the selection of cables is different from ordinary buildings. There are many people in high-rise buildings, and it is difficult to evacuate people when a fire occurs. If the trapped people stay on the floor for a long time, it is necessary to require the selected cables to have higher fire resistance and environmental protection. Traditional cables are mainly made of copper or aluminum as the conductive core, and then wrapped with an insulating layer. Most of the insulating layers used are PVC (polyvinyl chloride) and PE (polyethylene) insulating materials. The performance is far from meeting the Ministry of Housing and Urban-Rural Development's safety and fire protection requirements for high-rise building design; especially the chlorine molecule in the above-mentioned PVC insulating material is a toxic substance that will produce highly toxic smoke when burned in an accidental fire. Suffocate people in a short period of time, especially for high-rise buildings where evacuation is difficult, which will undoubtedly increase the damage caused by the secondary disaster of poisonous smoke to trapped people; Due to its own defects, when it is powered on and heated, it will release harmful components such as toxic smoke, which poses a great environmental and safety hazard to the residents. However, the use temperature of the wires of the traditional cable is 90 ° C, and the overall temperature resistance of the cable is 950 ° C. In the event of a fire At this time, this temperature level obviously cannot meet the requirements of heat-resistant insulation and flame-retardant fire protection. When the fire spreads and increases, it will burn immediately, causing secondary disasters and expanding the disaster situation. At present, there are more than 20,000 personal injury accidents caused by fires caused by electrical defects in my country every year, which have caused major losses to the national economic construction. Therefore, it is urgent to develop a new type of flame-retardant and environmentally friendly fire-resistant cable.

Utility model content

The purpose of the utility model is to provide a fireproof cable, which has the excellent performance of temperature resistance, flame retardancy, safety and environmental protection, can effectively prevent the fire from eroding the cable when a fire occurs, and is beneficial to the safe evacuation of trapped people.

The technical scheme of the utility model is as follows: a fireproof cable, including a protective sheath and a wire, characterized in that: the wire includes a conductive wire core, a neutral wire core, an inner insulating layer, an outer insulating layer, the conductive wire core, the middle The outer side of the wire core is covered and wrapped in turn with the inner insulating layer and the outer insulating layer, and the inner insulating layer and the outer insulating layer are made of environmentally friendly heat-resistant and flame-retardant materials; the protective cover includes an inner protective cover and an outer protective cover. The inner protective sheath is covered and wrapped around the outside of the wires to bundle the wires into a cable. The outer protective sheath is extruded and covered on the outer side of the inner protective sheath, and both the inner protective sheath and the outer protective sheath are made of environmentally friendly temperature-resistant and flame-retardant materials; between the wires, and between the wires and the inner protective sheath There are fire-proof and high-temperature-resistant material fillers between them.

The environment-friendly, temperature-resistant and flame-retardant materials used in the above-mentioned inner insulating layer and outer protective sheath are mineral insulating materials.

The environment-friendly temperature-resistant and flame-retardant material used in the above-mentioned outer insulating layer is a porcelain-modified polymer fire-proof insulating material.

The environment-friendly temperature-resistant and flame-retardant material used in the above-mentioned inner protective cover is a high-strength polyester film.

The above-mentioned fire-proof and high-temperature-resistant material filling is a mesh structure.

The above-mentioned conductive wire cores and neutral wire cores are multi-core conductive wire cores, which are re-twisted through a drawing process.

The above-mentioned conductive wire core and neutral wire core are annealed annealed copper wire or new rare earth aluminum alloy wire.

The utility model provides a kind of fireproof cable, all the insulation materials used are environment-friendly temperature-resistant and flame-retardant materials. The outer wrapping and the inner and outer two layers of insulation are protected against heat and fire, which is safe and reliable; after the wires are bundled into cables, they are surrounded by two layers of inner and outer protective sheaths with heat-resistant and flame-retardant properties, which further prevents the conductive core from being eroded by fire and greatly improves The cable is resistant to temperature and fire. At the same time, mineral fillers are installed to enhance the heat dissipation effect of the cable. Therefore, this fireproof cable has excellent performance of temperature resistance, flame retardancy, safety and environmental protection, and can effectively prevent the fire from eroding the cable when a fire occurs. , to prevent secondary disasters such as smoke and poison produced by cable burning, especially for the safe escape and evacuation of high-rise building personnel.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a schematic cross-sectional view of the utility model.

detailed description

The implementation of the present utility model will be described by specific specific examples below, and those who are familiar with this technology can clearly understand the advantages and effects of the present utility model from the content disclosed in this specification.

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

As shown in Figures 1 and 2, a fireproof cable includes three annealed annealed soft copper conductive wire cores 1 and a neutral wire core 4 of an annealed copper wire. According to the user's power supply requirements, the outer sides of each conductive wire core are overlapped and covered for wrapping. An inner insulating layer 2, in order to improve fire resistance and flame retardancy, the inner insulating layer 2 is made of an environmentally friendly, temperature-resistant and flame-retardant material, which can be an inorganic mineral insulating material containing magnesia, quartz, and mica , or a polymer composite material that does not contain halogen (such as fluorine, chlorine), such as a common polymer composite material that is added with a metal hydrate flame retardant mainly composed of Al(OH) ₃ and Mg(OH) ₂ ; All can be used as the temperature-resistant and flame-retardant materials required for the fire-resistant cables. In view of the process cost, the mineral insulating material with good insulation and temperature resistance is preferred here, which can effectively prevent the conductive core 1 from oxygen and flame retardancy; an outer insulating layer 3 is extruded on the outside of the inner insulating layer 2 , forming a complete wire, the outer insulating layer 3 is made of environmentally friendly heat-resistant and flame-retardant materials, and the conductive wire core 1 is protected against fire and insulation, and forms a double protective barrier together with the inner insulating layer 2, so as to Further improve the fire and flame retardancy of each wire. Combine all the wires into a cable. The cable forming process is to wrap an inner protective sleeve 6 on the outer side of each wire with a double-layer cover, and wrap 4 wires together to form a cable; because when several wires are combined into a cable, There will be gaps between the wires, resulting in irregular shape of the cable. Therefore, in order to ensure the roundness of the cable, a fireproof and high temperature resistant material is specially filled. In consideration of the reliability of fireproof insulation, the selected fireproof and high temperature resistant material is preferred. Mineral insulation for further fire resistance. Finally, an extrusion process is adopted on the outside of the inner protective sheath 6 to extrude a protective sheath 7 made of mineral insulating material.

The above-mentioned mineral insulating materials are halogen-free, and contain inorganic minerals such as magnesia or quartz, mica, etc., such as magnesia, which has high fire-resistant and insulating properties, and can be transformed into crystals by burning at a high temperature above 1000 ° C, and it will become dead burning when it rises above 1500 ° C. Magnesia (that is, the so-called magnesia) or sintered magnesia, even if it burns under fire conditions, it will not emit acid, poisonous gas and other gases, and its smoke emission test has a light transmittance of more than 80%, which is much higher than ordinary 60% of the cable standard, and the escape of personnel will not be disturbed by sight when a fire occurs. Its above-mentioned characteristics are much better than traditional PVC (polyvinyl chloride) and PE (polyethylene) cable insulation materials. The temperature level can be increased from the traditional 950°C to 1600°C.

Further, the filler 5 has a mesh structure. This mesh material can be preferably a mineral insulating material, which has high temperature resistance, good air permeability, and strong heat dissipation. The use of this structure can ensure the overall roundness and softness of the cable; When an outbreak occurs, each mesh gap can isolate the fire into small chambers to cool down and dissipate heat, effectively preventing the fire from spreading and expanding.

Further, the environment-friendly temperature-resistant and flame-retardant material used in the above-mentioned outer insulating layer 3 is a porcelain-modified polymer fire-proof insulating material, which specifically adds clay mineral powder fillers and structural Control agent and other additives are prepared. This composite material has the properties of ordinary wire and cable insulation layer materials at room temperature, and forms a hard ceramic protective layer when burned at high temperature, which can play the role of isolating flames and preventing fire. The temperature-resistant insulation material for harmful and toxic substances, and the porcelain-modified polymer insulation material can be completed by conventional extrusion molding process, the manufacturing process is simple, the cost is low, and the use is safe and reliable.

Furthermore, the inner protective sheath 6 is made of high-strength polyester film, which is also a good fire-proof and high-temperature-resistant material. The above-mentioned wires are wrapped by the inner protective sheath 6, which further improves the roundness of the cable. Integrity, reducing the outer diameter of the cable, saving raw materials.

Further, the above-mentioned conductive core 1 and neutral core 4 are multi-core conductive cores, which are re-twisted through a drawing process. The conductive cores are twisted with multiple strands of copper wire, with uniform thickness, smooth surface, long length, and flexible.

Further, in addition to the above-mentioned annealed annealed copper as the conductive core, the conductive core 1 can also be made of a new rare earth aluminum alloy conductor, which is light in weight, cheap in price, and good in softness and flexibility, which can ensure that the cable has a higher performance during use. bendability.

The above-mentioned cable wires can be made into three or five wires as required, and are not limited to the four wires in the above-mentioned embodiment.

In the fireproof cable provided by the utility model, the insulating materials used are all environmentally friendly heat-resistant and flame-retardant materials, and mineral insulating materials are used to effectively avoid the release of toxic gas and smoke, and the heat-resistant and fire-resistant performance of the cable is enhanced. The multi-core annealed soft copper conductor is tightly twisted. The conductive wire cores are wrapped or extruded with mineral fire-proof insulating materials, which can effectively prevent the conductive wire cores from being eroded by fire, improve the resistance and fire resistance of the cables, and ensure the roundness of the cables. Aesthetics, flexibility and service life; at the same time, the mesh mineral filler is set to further enhance the heat dissipation effect of the cable and the temperature resistance and fire resistance level, making the cable safer and more environmentally friendly. To sum up, the fireproof cable has excellent performance of temperature resistance, flame retardancy, safety and environmental protection, and can effectively prevent the fire from eroding the cable when a fire occurs, which is conducive to the safe escape and evacuation of personnel. The above combustion flue gas transmittance has won precious time for fire rescue. In addition, compared with other fireproof cables equipped with metal casings such as aluminum alloy, the utility model is simpler to manufacture, lower in cost and more suitable for popularization and application on the premise of fully meeting the fireproof and flame retardant requirements.

The above-mentioned embodiments only illustrate the principles and effects of the present utility model, but are not intended to limit the present utility model. Anyone familiar with this technology can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the utility model should still be covered by the claims of the utility model.

Claims (6)

1. a fireproof cable, comprise protective sleeve and wire, it is characterized in that: described wire comprises conductor wire core (1), neutral core (4), inner insulating layer (2), external insulation layer (3), described conductor wire core (1), neutral core (4) outside puts up wrapped inner insulating layer (2) and external insulation layer (3) successively, and described inner insulating layer (2) and external insulation layer (3) are all environmental protection heatproof flame-retardant material and make; Described protective sleeve comprises internal protective cover (6) and outer jointing jacket (7), and described internal protective cover (6) is put up wrapped outside described wire, by described wire boundling stranding; Described outer jointing jacket (7) extrudes and is covered in internal protective cover (6) outside, and described internal protective cover (6) and outer jointing jacket (7) are all environmental protection heatproof flame-retardant material and make; Between described wire, and be equipped with high-temperature resistant material filler (5) of preventing fires between described wire and described internal protective cover (6), described fire prevention high-temperature resistant material filler (5) is network structure.

2. fireproof cable according to claim 1, is characterized in that described inner insulating layer (2) and outer jointing jacket (7) are mineral insulating material.

3. fireproof cable according to claim 1, is characterized in that described external insulation layer (3) is for porcelain modified high-molecular fire-retardant insulating material.

4. fireproof cable according to claim 1, is characterized in that described internal protective cover (6) forms for the coiling of high-strength polyester film.

5. fireproof cable according to claim 1, is characterized in that described conductor wire core (1), neutral core (4) is multicore conductor wire core, twist again form through drawing process.

6. fireproof cable according to any one of claim 1-5, is characterized in that described conductor wire core (1) and neutral core (4) are annealed copper wire or new rare-earth aluminum alloy lead wire.