Fire-resistant irradiation cable

Abstract

The utility model relates to the technical field of cables, in particular to a fire-resistant irradiation cable, which is characterized in that a plurality of core wires are arranged side by side, and the peripheries of the core wires are coated with sheath layers, so that the cable of a flat structure is formed. The core wire comprises an inner conductor, a first isolation belt wrapping the inner conductor, an insulating layer wrapping the first isolation belt and a second isolation belt wrapping the insulating layer, and the first isolation belt and the second isolation belt are ceramic silicone rubber belts. When the cable is burnt, the ceramic silicone rubber tape cannot be pulverized and can form a hard shell, so that fire insulation and heat insulation effects are achieved on the inner conductor in the cable, the fire-resistant requirement is met, the electric power and communication transmission capacity of the cable is guaranteed within a certain time, casualties and life and property losses are reduced, and the service life of the cable is prolonged. And the sheath layer further improves the mechanical shock resistance, the biological resistance, the tensile resistance and the shock resistance of the cable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cables, in particular to a fire-resistant irradiation cable. BACKGROUND

[0002] In places with higher requirements for safety, such as high-rise buildings, subways, tunnels, hospitals, schools, etc., once a fire occurs, it is necessary to ensure the smoothness of power and communication within a certain period of time, so it is necessary to use electric wires with high fire resistance to ensure the safe operation of the electrical system. The existing traditional flat structure cable usually includes conductors arranged side by side and insulating layers covering each conductor. Such flat cables do not reach the fireproof burning level and cannot meet the demand of fireproof flat wires. CONTENT OF THE UTILITY MODEL

[0003] In order to solve the above technical problems, the present application provides a fire-resistant irradiation cable, which comprises a plurality of core wires arranged side by side and a sheath layer covering the plurality of core wires, the core wire comprises an inner conductor, a first isolation band wrapped around the inner conductor, an insulating layer wrapped around the first isolation band, and a second isolation band wrapped around the insulating layer, and the first isolation band and the second isolation band are made of ceramicized silicone rubber bands.

[0004] Preferably, the inner conductor is made of multiple strands of low-oxygen copper twisted together.

[0005] Preferably, the first isolation band is wrapped with at least two layers.

[0006] Preferably, the thickness of the first isolation band is 0.2-0.3mm.

[0007] Preferably, the thickness of the second isolation band is 0.8-1mm, and the overlapping coverage rate of the second isolation band is greater than 20%.

[0008] Preferably, the material of the sheath layer is low-smoke halogen-free irradiation polyolefin sheath material.

[0009] Preferably, the material of the insulating layer is irradiation cross-linked polyethylene material.

[0010] Preferably, a boss is formed on the upper surface of the sheath layer.

[0011] From the above, the application can obtain the following beneficial effects: by arranging several core wires side by side, and coating the core wires with a sheath layer, a flat structure cable is formed, the core wire includes an inner conductor, a first isolation band wrapped around the inner conductor, an insulation layer wrapped around the first isolation band, and a second isolation band wrapped around the insulation layer, the first isolation band and the second isolation band are made of ceramicized silicone rubber band. When the cable is on fire, the ceramicized silicone rubber band will not powder and will form a hard shell, thereby playing a fireproof and heat insulation effect on the inner conductor inside the cable, meeting the fireproof requirement, thereby ensuring the power and communication transmission capacity of the cable within a certain period of time, reducing personnel casualties and loss of life and property. The sheath layer further improves the mechanical impact resistance, biological resistance, tensile strength and shock resistance of the cable. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the description of the embodiments of the present application or the prior art will be briefly introduced. Obviously, the drawings in the following description are only part of the embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0013] Figure 1 The structure of the fireproof irradiation cable of the present application is shown in the figure. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0015] EMBODIMENT

[0016] In order to solve the above technical problems, the present application provides a fireproof irradiation cable, which comprises Figure 1As shown, several parallelly arranged core wires and a sheath layer 10 covering the several core wires are provided to form a flat structure cable, the core wire comprises an inner conductor 20, a first isolation tape 30 wrapped around the inner conductor 20, an insulation layer 40 covering the first isolation tape 30, and a second isolation tape 50 wrapped around the insulation layer 40, the first isolation tape 30 and the second isolation tape 50 are made of ceramicized silicone rubber tape. When the cable encounters combustion, the ceramicized silicone rubber tape will not powder and will form a hard shell, thereby playing a fireproof and heat insulation effect on the inner conductor 20 inside the cable, meeting the fireproof requirement of the cable, thereby ensuring the power and communication transmission capacity of the cable for a certain period of time, reducing the casualties and losses of life and property.

[0017] Specifically, the inner conductor 20 is twisted by multiple strands of low-oxygen copper. The conductor structure has the characteristics of small resistance and small cable transmission loss by twisting 6 strands of low-oxygen copper.

[0018] Further, the first isolation tape 30 wrapped around the surface of the inner conductor 20 is at least wrapped around two layers. The thickness of the first isolation tape 30 is 0.2-0.3mm, and the thickness of the first isolation tape 30 is 0.2mm in an example. The composite tape is tightly overlapped, soft, and has good fireproof and heat insulation effect.

[0019] Further, an insulation layer 40 is extruded outside the first isolation tape 30, the material of the insulation layer 40 is irradiation cross-linked polyethylene material, and the insulation layer 40 is formed by extrusion molding of irradiation cross-linked polyethylene material and then irradiation cross-linking, so that the temperature resistance of the insulated core wire can reach 150℃.

[0020] Further, a second isolation tape 50 is wrapped around the insulation layer 40, the thickness of the second isolation tape 50 is 0.8-1mm, and the thickness of the second isolation tape 50 is 0.8mm in an example, and the overlapping coverage rate of the second isolation tape 50 is greater than 20%. The first isolation tape 30 and the second isolation tape 50 are both made of ceramicized silicone rubber tape, which will not powder and will form a hard shell when encountering combustion, thereby ensuring the structural integrity under the condition of flame combustion, thereby ensuring the power and communication transmission capacity of the cable for a certain period of time.

[0021] Further, a sheath layer 10 is extruded around the several core wires, the material of the sheath layer 10 is low-smoke halogen-free irradiation polyolefin sheath material, which further improves the mechanical impact resistance, biological resistance, tensile strength and shock resistance, so that the cable can pass the most stringent BS6387 spray and vibration CWZ level test.

[0022] In the above scheme, a boss 11 is formed on the upper surface of the sheath layer 10, and the boss 11 plays a positioning role when the flat structure cable is installed.

[0023] In summary, the scheme of the application forms a flat structure cable by arranging several core wires side by side and coating the core wires with a sheath layer, wherein the core wire comprises an inner conductor, a first isolation tape wrapped around the inner conductor, an insulation layer wrapped around the first isolation tape, and a second isolation tape wrapped around the insulation layer, and the first and second isolation tapes are made of ceramicized silicone rubber tapes. When the cable is on fire, the ceramicized silicone rubber tapes will not crumble and will form a hard shell, thereby playing a fireproof and heatproof effect on the inner conductor inside the cable, meeting the fireproof requirement, thereby ensuring the power and communication transmission capacity of the cable within a certain period of time, reducing the casualties and losses of life and property.

[0024] The above-mentioned embodiments do not constitute a limitation on the protection scope of the technical scheme. Any modification, equivalent replacement and improvement within the spirit and principles of the above-mentioned embodiments shall be included in the protection scope of the technical scheme.

Claims

1. A fire resistant radiation cable, characterized by: The cable comprises a plurality of core wires arranged side by side, and a sheath layer (10) covering the plurality of core wires, the core wire comprises an inner conductor (20), a first isolation tape (30) wrapped around the inner conductor (20), an insulation layer (40) wrapped around the first isolation tape (30), and a second isolation tape (50) wrapped around the insulation layer (40), the first isolation tape (30) and the second isolation tape (50) are made of ceramicized silicone rubber tape.

2. The fire resistant radiation cable of claim 1, wherein: The inner conductor (20) is twisted by a plurality of low-oxygen copper wires.

3. The fire resistant radiation cable of claim 1, wherein: The first isolation tape (30) is wrapped at least twice.

4. The fire resistant radiation cable of claim 3, wherein: The thickness of the first isolation tape (30) is 0.2-0.3mm.

5. The fire resistant radiation cable of claim 1, wherein: The thickness of the second isolation tape (50) is 0.8-1mm, and the overlapping coverage rate of the second isolation tape (50) is greater than 20%.

6. The fire resistant radiation cable of claim 1, wherein: The material of the sheath layer (10) is low-smoke halogen-free irradiation polyolefin sheath material.

7. The fire resistant radiation cable of claim 1, wherein: The material of the insulation layer (40) is irradiation cross-linked polyethylene material.

8. The fire resistant radiation cable of claim 1, wherein: A boss (11) is formed on the upper surface of the sheath layer (10).

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