A fire-resistant and flame-retardant cable

Abstract

The present invention discloses a fireproof and flame-retardant cable, comprising a plurality of cable cores, each cable core comprising a conductor and an insulating layer, a metal sheath layer and an outer protective layer being sequentially arranged outside the plurality of cable cores; a fireproof wrapping layer being arranged outside the plurality of cable cores, a flame-retardant filling layer being arranged between the fireproof wrapping layer and the plurality of cables, a flame-retardant partition bracket being arranged inside the flame-retardant filling layer, and the flame-retardant partition bracket isolating the plurality of cable cores from each other; a fireproof tape layer being arranged outside the fireproof wrapping layer. The present invention can improve the overall flame-retardant and fireproof performance of the cable, avoid rapid combustion of the cable in the event of a fire, and improve the safety of the cable in use.

Description

Technical Field

[0001] The invention relates to the technical field of cables, and in particular to a fire-proof and flame-retardant cable. Background Art

[0002] Cables are widely used in power transmission in life and play an extremely important role in all walks of life. Therefore, the fire resistance of cables has received more and more attention. Existing flame-retardant and fire-proof cables are generally made by mixing flame retardants with cable insulation materials to form a fire-proof protective layer. However, such cables have poor fire-retardant effects. In the event of a fire, they still cannot avoid burning, and then a more serious fire occurs, causing personal safety and significant economic losses. Therefore, cables with better flame-retardant and fire-proof effects are very necessary for people's lives. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a fire-proof and flame-retardant cable, which can improve the flame-retardant and fire-proof effect of the cable and improve the safety of the cable in use.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a fire-proof and flame-retardant cable, comprising a plurality of cable cores, each cable core comprising a conductor and an insulating layer, and a metal sheath layer and an outer protective layer are sequentially arranged outside the plurality of cable cores; a fire-proof wrapping layer is arranged outside the plurality of cable cores, a flame-retardant filling layer is arranged between the fire-proof wrapping layer and the plurality of cables, a flame-retardant partition bracket is arranged inside the flame-retardant filling layer, and the flame-retardant partition bracket isolates the plurality of cable cores from each other; a fire-proof tape layer is arranged outside the fire-proof wrapping layer.

[0005] A flame retardant carbon solidified layer is arranged between the fireproof wrapping layer and the fireproof tape layer. When encountering combustion, the flame retardant carbon solidified layer can form strong carbonization to prevent the fire source from quickly burning into the cable.

[0006] The cross section of the fireproof wrapping layer is a quadrilateral, which can facilitate the internal flame-retardant partition bracket to separate and reasonably distribute the cable cores.

[0007] The four corners of the fireproof wrapping layer are provided with shaped concave edges which are concave and abut against the ends of the flame-retardant partition brackets. The ends of the flame-retardant partition brackets abut against the fireproof wrapping layer, which can enhance the overall compressive strength of the cable.

[0008] The flame retardant carbon solidified layer is provided with an inner convex positioning portion corresponding to the shaping concave edge portion; so that when the flame retardant carbon solidified layer burns and carbonizes, the fit between the inner convex positioning portion and the shaping concave edge portion can enhance the strength of adhesion after carbonization.

[0009] A plurality of heat dissipation holes are evenly arranged on the inner circumference of the flame retardant carbon solidified layer, and the positions of the heat dissipation holes correspond to the inner convex positioning parts. After the flame retardant carbon solidified layer is burned and carbonized, the heat dissipation holes can accelerate the heat dissipation after carbonization.

[0010] The beneficial effects of the present invention are:

[0011] Compared with the prior art, the present invention provides a fireproof wrapping layer outside the plurality of cable cores, and a flame-retardant filling layer is provided between the fireproof wrapping layer and the plurality of cable cores, which can effectively prevent the occurrence of fire and improve the fire resistance and flame retardancy of the entire cable, and the flame-retardant separation bracket isolates the plurality of cable cores from each other. In the event of a fire, the plurality of cable cores are isolated from each other, so that each cable core is in an independent area, thereby preventing the transmission of fire among the plurality of cable cores in the event of a fire, and further improving the fire resistance and flame retardancy of the cable as a whole; a fireproof tape layer and a metal sheath layer are provided outside the fireproof layer, which not only improve the fire resistance effect of the cable, but also improve the overall structural strength of the cable.

[0012] Compared with the previous technology, the present invention is equipped with a flame retardant carbon solidified layer inside the cable. When a fire occurs and burns to the flame retardant carbon solidified layer, the flame retardant carbon solidified layer burns and undergoes strong carbonization, thereby effectively extending the time for the flame to burn to the cable core, buying time for fire rescue, and improving the overall fire retardant effect of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0014] The present invention will be further described in conjunction with the accompanying drawings.

[0015] See also Figure 1 The present invention provides a fire-resistant and flame-retardant cable, comprising a plurality of cable cores, each of which comprises a conductor 1 and an insulating layer 2. A metal sheath layer 3 and an outer protective layer 4 are sequentially arranged outside the plurality of cable cores; a fire-resistant wrapping layer 5 is arranged outside the plurality of cable cores, and the fire-resistant wrapping layer 5 can be made of a high-temperature resistant and fire-resistant silicone rubber material and has a certain elasticity; a flame-retardant filling layer 6 is arranged between the fire-resistant wrapping layer 5 and the plurality of cables, and the flame-retardant filling layer 6 can be formed by a magnesium-based or aluminum-based fire-resistant material preparation, and the fire-resistant wrapping layer 5 cooperates with the flame-retardant filling layer 6 to prevent the cable from being cut off. The core and the fire source come into direct combustion contact to ensure the flame retardancy of the cable in the event of a fire; a flame retardant partition bracket 7 is arranged in the flame retardant filling layer 6, and the flame retardant partition bracket 7 can also be made of high-temperature resistant and fire-proof silicone rubber material, which can isolate and separate several cable cores from each other, and effectively avoid the contact and combustion transmission between the cable cores in the event of a fire; a fire-retardant wrapping layer 5 is arranged outside the fire-retardant tape layer 8, and a layer of fire-retardant coating can also be coated on the fire-retardant tape layer 8 as needed, which can be formed by a wrapping processing technology, which can further improve the overall flame retardancy and high temperature resistance of the cable.

[0016] A flame retardant carbon solidified layer 9 is arranged between the fireproof wrapping layer 5 and the fireproof tape layer 8. The flame retardant carbon solidified layer 9 can be made of ceramic silicone rubber material. The ceramic silicone rubber material can be burned by fire to form a hard protective layer. When encountering combustion, the flame retardant carbon solidified layer 9 can form strong carbonization to prevent the internal cable core from contacting the external fire source. The flame retardant carbon solidified layer 9 cooperates with the internal fireproof wrapping layer 5 and the flame retardant filling layer 6 three-layer structure to effectively prevent the fire source from quickly burning into the cable.

[0017] The cross section of the fireproof wrapping layer 5 is a quadrilateral shape, which can facilitate the internal flame-retardant partition bracket 7 to separate the cable cores for reasonable distribution; the four corners of the fireproof wrapping layer 5 are provided with a concave edge portion 10 that is concave and abuts against the end of the flame-retardant partition bracket 7. The end of the flame-retardant partition bracket 7 abuts against the fireproof wrapping layer 5, which can enhance the overall compressive strength of the cable.

[0018] The flame retardant carbon solidified layer 9 is provided with an inner convex positioning portion 11 corresponding to the shaping concave edge portion 10; so that when the flame retardant carbon solidified layer 9 burns and carbonizes, the fit between the inner convex positioning portion 11 and the shaping concave edge portion 10 can enhance the strength of adhesion after carbonization, avoiding the situation where the adhesion after carbonization is not strong enough and falls off.

[0019] The inner circumference of the flame retardant carbon solidified layer 9 is evenly provided with a plurality of heat dissipation holes 12, and the positions of the heat dissipation holes 12 correspond to the inner convex positioning parts 11. After the flame retardant carbon solidified layer 9 is burned and carbonized, the heat dissipation holes 12 can accelerate the heat dissipation of the flame retardant carbon solidified layer 9 after it is burned to form a strong carbonized layer.

[0020] In the practical embodiment, when a fire occurs in the cable, the fireproof wrapping layer 5 and the flame-retardant filling layer 6 between the fireproof wrapping layer 5 and the cable core can have a flame-retardant effect on the external fire source, thereby effectively avoiding the rapid combustion of the internal cable core and causing a more serious fire; a flame-retardant partition bracket 7 is provided in the flame-retardant filling layer 6, and the flame-retardant partition bracket 7 can isolate the cable cores from each other. Once the fire source burns to the internal cable core, the cable cores will not quickly transmit fire to each other. At the same time, the end of the flame-retardant partition bracket 7 abuts against the fireproof wrapping layer 5, which can also improve the compression strength of the internal cable core; and a flame-retardant carbon solidified layer 9 is provided in the fireproof wrapping layer 5. When the flame-retardant carbon solidified layer 9 encounters combustion, it will undergo strong carbonization, and the strong carbonization will adhere to the fireproof wrapping layer 5, which can isolate the internal combustible material from rapid contact and combustion with the fire source.

[0021] The above is a detailed introduction to a fire-proof and flame-retardant cable provided in an embodiment of the present invention. Specific examples are used in this article to illustrate the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the technical solution disclosed by the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as a limitation of the present invention.

Claims

1. A fire-retardant cable, comprising a plurality of cable cores, each of which comprises a conductor and an insulating layer, characterized in that: The plurality of cable cores are provided with a metal sheath layer and an outer protective layer in sequence; the plurality of cable cores are provided with a fireproof wrapping layer, a flame-retardant filling layer is provided between the fireproof wrapping layer and the plurality of cables, a flame-retardant partition bracket is provided inside the flame-retardant filling layer, and the flame-retardant partition bracket isolates the plurality of cable cores from each other; the fireproof wrapping layer is provided with a fireproof tape layer; The cross-section of the fireproof wrapping layer is a quadrilateral shape, and the four corners of the fireproof wrapping layer are provided with concave shaped edge portions that are concave and abut against the end of the flame-retardant partition bracket. A flame-retardant carbon solidified layer is provided between the fireproof wrapping layer and the fireproof tape layer, and the flame-retardant carbon solidified layer is provided with an inward convex positioning portion corresponding to the shaped concave edge portion.

2. A fire-resistant and flame-retardant cable according to claim 1, characterized in that: A plurality of heat dissipation holes are evenly arranged on the inner circumference of the flame-retardant carbon solidified layer, and the positions of the heat dissipation holes correspond to the inner convex positioning parts.

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