A long-life irradiation crosslinking halogen-free low-smoke fire-resistant cable

Abstract

The utility model discloses a kind of high-life irradiation crosslinking halogen-free low-smoke fire-resistant cable, it is related to cable technical field, including multiple wire cores, each wire core includes conductor, the conductor is covered with fire resistance layer, the fire resistance layer is covered with insulating layer, the insulating layer is covered with composite shielding layer outside, the multiple wire cores are externally provided with cable core formed by bundling belt, the cable core is externally provided with the square outer sheath of extrusion molding.The utility model can meet the high-life required by modern building, flame-retardant, fire resistance performance is superior, square structure design is conducive to heat dissipation when cable operation, improves load flow and long-term stability, stress distribution is more uniform when square structure bears external pressure, not easy to deform.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, specifically, to a high-life irradiated cross-linked halogen-free, low-smoke fire-resistant cable. Background Technology

[0002] With the gradual advancement of urbanization and the rapid and steady development of key projects such as high-rise buildings, there are more and more high-rise buildings and densely populated public places. Due to technical, process and material reasons, the service life of early wires and cables was relatively short. Cables exceeding their service life can cause short circuits and tripping, or even fires due to sparking. There is an urgent need for a fire-resistant, flame-retardant and long-life cable. Utility Model Content

[0003] The purpose of this invention is to provide a high-life irradiated cross-linked halogen-free low-smoke fire-resistant cable to solve the problems of short cable life and flammability leading to fires in the prior art.

[0004] The present invention solves the above problems through the following technical solution:

[0005] A high-life irradiated cross-linked halogen-free low-smoke fire-resistant cable includes multiple cores, each core including a conductor, the conductor being covered with a fire-resistant layer, the fire-resistant layer being covered with an insulation layer, the insulation layer being covered with a composite shielding layer, the multiple cores being provided with binding straps to form a cable core, and the cable core being provided with an extruded square outer sheath.

[0006] Furthermore, the insulating layer includes an inner insulating layer covering the outside of the fire-resistant layer and an insulating layer covering the outside of the inner insulating layer.

[0007] Furthermore, the inner and outer insulating layers are made of irradiated cross-linked polyolefin.

[0008] Furthermore, the composite shielding layer includes an aluminum foil covering the outside of the insulating layer and a copper wire shielding mesh woven outside the aluminum foil.

[0009] Furthermore, the conductor is made of copper, preferably the fifth type of copper conductor in GB / T3956, which is a flexible conductor used in flexible cables or wires.

[0010] Furthermore, the material of the refractory layer is phlogopite mica tape, which is a type of refractory mica tape.

[0011] Furthermore, the binding tape is alkali-free fiberglass tape, which has the advantages of good insulation performance, strong tensile strength, no wrinkling or breakage, sulfur resistance, smokeless, halogen-free and non-toxic, and non-flammable in pure oxygen, thus achieving a long service life of the cable and flame retardancy or improving the flame retardancy rating of the cable.

[0012] Furthermore, the square outer sheath is made of halogen-free, low-smoke, flame-retardant polyolefin, which has excellent flame retardancy.

[0013] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0014] This utility model can meet the requirements of modern buildings for long service life, flame retardancy and fire resistance. The square structure design is conducive to heat dissipation during cable operation, improving current carrying capacity and long-term stability. The square structure has a more uniform stress distribution when subjected to external pressure and is not easily deformed. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Among them, 1-conductor; 2-fire resistant layer; 3-inner insulation layer; 4-outer insulation layer; 5-aluminum foil; 6-copper wire shielding mesh; 7-bundling strap; 8-square outer sheath. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the embodiments, but the implementation of the present invention is not limited thereto.

[0018] Example 1:

[0019] Combined with appendix Figure 1 As shown, a high-life irradiated cross-linked halogen-free low-smoke fire-resistant cable includes multiple cores, each core including a conductor 1, the conductor being covered with a fire-resistant layer 2, the fire-resistant layer 2 being covered with an insulation layer, the insulation layer being covered with a composite shielding layer, the multiple cores being provided with binding straps 7 to form a cable core, and the cable core being provided with an extruded square outer sheath 8.

[0020] Furthermore, the insulating layer includes an inner insulating layer 3 covering the outside of the fire-resistant layer 2 and an insulating layer 4 covering the outside of the inner insulating layer 3.

[0021] Furthermore, the inner insulating layer 3 and the outer insulating layer 4 are made of irradiated cross-linked polyolefin.

[0022] Furthermore, the composite shielding layer includes an aluminum foil 5 covering the outside of the insulating layer and a copper wire shielding mesh 6 woven on the outside of the aluminum foil 5.

[0023] Furthermore, the conductor 1 is made of copper, preferably the fifth type of copper conductor in GB / T3956, which is a flexible conductor used in flexible cables or wires.

[0024] Furthermore, the material of the refractory layer 2 is phlogopite mica tape from the refractory mica tape.

[0025] Furthermore, the binding tape 7 is an alkali-free fiberglass tape, which has the advantages of good insulation performance, strong tensile strength, no wrinkling or breakage, sulfur resistance, smokeless, halogen-free and non-toxic, and non-flammable in pure oxygen, thus achieving a long service life of the cable and flame retardancy or improving the flame retardancy rating of the cable.

[0026] Furthermore, the square outer sheath 8 is made of halogen-free, low-smoke, flame-retardant polyolefin, which has excellent flame retardancy.

[0027] This utility model can meet the requirements of modern buildings for long service life, flame retardancy and superior fire resistance. The square structure is conducive to heat dissipation during cable operation, improving current carrying capacity and long-term stability. The square structure has a more uniform stress distribution when subjected to external pressure and is not easily deformed.

[0028] Although the present invention has been described herein with reference to illustrative embodiments, the above embodiments are merely preferred embodiments of the present invention, and the implementation of the present invention is not limited to the above embodiments. It should be understood that those skilled in the art can design many other modifications and implementations, which will fall within the scope and spirit of the principles disclosed in this application.

Claims

1. A high-life radiation cross-linked halogen-free, low-smoke fire-resistant cable, characterized in that, It includes multiple wire cores, each of which includes a conductor (1), the conductor is covered with a fire-resistant layer (2), the fire-resistant layer (2) is covered with an insulation layer, the insulation layer is covered with a composite shielding layer, the multiple wire cores are provided with a binding strap (7) to form a cable core, and the cable core is provided with an extruded square outer sheath (8).

2. The high-life irradiation cross-linked halogen-free low-smoke fire-resistant cable according to claim 1, characterized in that, The insulation layer includes an inner insulation layer (3) covering the outside of the fire-resistant layer (2) and an insulation layer (4) covering the outside of the inner insulation layer (3).

3. The high-life irradiation cross-linked halogen-free low-smoke fire-resistant cable according to claim 2, characterized in that, The inner insulation layer (3) and the outer insulation layer (4) are made of irradiated cross-linked polyolefin.

4. The high-life irradiation cross-linked halogen-free low-smoke fire-resistant cable according to claim 1, characterized in that, The composite shielding layer includes an aluminum foil (5) covering the outside of the insulating layer and a copper wire shielding mesh (6) woven on the outside of the aluminum foil (5).

5. The high-life irradiation cross-linked halogen-free low-smoke fire-resistant cable according to claim 1, characterized in that, The conductor (1) is made of copper.

6. The high-life irradiation cross-linked halogen-free low-smoke fire-resistant cable according to claim 1, characterized in that, The refractory layer (2) is made of phlogopite tape.

7. The high-life irradiation cross-linked halogen-free low-smoke fire-resistant cable according to claim 1, characterized in that, The binding tape (7) is an alkali-free fiberglass tape.

8. The high-life irradiation cross-linked halogen-free low-smoke fire-resistant cable according to claim 1, characterized in that, The square outer sheath (8) is made of halogen-free, low-smoke, flame-retardant polyolefin.

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