Irradiation crosslinking insulating fireproof flame-retardant cable

Abstract

The utility model discloses an irradiation crosslinking insulating fireproof flame-retardant cable, which comprises a cable core, the cable core comprises four wire cores and a filling layer, a wrapping layer is arranged outside the cable core, an inner sheath is arranged outside the wrapping layer, the inner sheath and the wrapping layer are formed through extrusion, and the filling layer is arranged between the inner sheath and the wrapping layer. The outer part of the inner sheath is provided with an armor layer, the armor layer is attached to the inner sheath, the outer part of the armor layer is provided with a composite protection layer, the outer part of the composite protection layer is provided with an outer sheath, the armor layer, the composite protection layer and the outer sheath are formed through extrusion, the composite protection layer is arranged between the armor layer and the outer sheath, and the composite protection layer is arranged between the composite protection layer and the outer sheath. The composite protection layer is of a multi-layer structure formed by polyolefin resin, PVC plastic and ceramic silicone rubber, and the polyolefin resin, the PVC plastic and the ceramic silicone rubber all have good insulating, fire-resistant and flame-retardant properties, so that the insulating, fire-resistant and flame-retardant properties of the prepared cable are greatly improved, and the use effect of the cable is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a radiation cross-linked insulated fire-resistant and flame-retardant cable. Background Art

[0002] Cable is a wire made of one or more mutually insulated conductors and an outer insulating protective layer, which is laid underground, in the air, etc. Cables are generally composed of three parts: conductor, insulating layer, and protective layer. There are usually two types of power cables and control cables. Power cables are mainly used for the transmission and distribution of electric energy; control cables are mainly used for measurement, protection, control and other lines.

[0003] The Chinese patent announcement number is CN218585683U, and the authorization announcement date is March 7, 2023. A radiation cross-linked insulated fire-resistant and flame-retardant cable includes a cable conductor and a safety mechanism. The surface of the cable conductor is wrapped with an insulating sheath of the safety mechanism. The safety mechanism is composed of a fire-resistant sheath, a flame-retardant sheath and an insulating sheath. The surface of the insulating sheath is wrapped with a flame-retardant sheath that can be used safely for the cable. The surface of the flame-retardant sheath is wrapped with a fire-resistant sheath that can be used safely for the cable. The fire-resistant sheath, the flame-retardant sheath and the insulating sheath are used in combination to achieve the insulation, fire-resistant and flame-retardant effects of the cable, thereby solving the problem of safe use of the cable.

[0004] The insulation fire retardant effect of existing cables is not good. The cables are easily damaged when used in special environments, which cannot ensure the safe use of the cables, reduce the use effect of the cables, and cannot meet the use requirements. Utility Model Content

[0005] The purpose of the utility model is to provide a radiation cross-linked insulated fire-resistant and flame-retardant cable to solve the problems mentioned in the above background technology that the insulation fire-resistant and flame-retardant effect of the existing cables is not good, the cables are easily damaged when used in special environments, the safe use of the cables cannot be guaranteed, the use effect of the cables is reduced, and the use requirements cannot be met.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a radiation cross-linked insulated fire-resistant and flame-retardant cable, comprising a cable core, the cable core comprising a wire core and a filling layer, four wire cores are arranged, a sheath is arranged on the outside of the cable core, and the sheath and the cable core are spirally wound, an inner sheath is arranged on the outside of the sheath, and the inner sheath and the sheath are formed by extrusion, an armor layer is arranged on the outside of the inner sheath, and the armor layer is fitted with the inner sheath, a composite protective layer is arranged on the outside of the armor layer, an outer sheath is arranged on the outside of the composite protective layer, and the armor layer, the composite protective layer and the outer sheath are formed by extrusion.

[0007] Preferably, the wire core includes a conductor, a shielding layer and an insulating layer, and the conductor is formed by twisting a plurality of metal wires, the shielding layer is arranged outside the conductor, the insulating layer is arranged outside the shielding layer, and the conductor, the shielding layer and the insulating layer are formed by extrusion.

[0008] Preferably, the composite protective layer includes polyolefin resin, PVC plastic and ceramic silicone rubber, the PVC plastic is arranged on the outside of the ceramic silicone rubber, the polyolefin resin is arranged on the outside of the PVC plastic, the polyolefin resin, PVC plastic and ceramic silicone rubber are arranged as a whole, the ceramic silicone rubber is in contact with the armor layer, and the polyolefin resin is in contact with the outer sheath.

[0009] Preferably, the insulating layer includes a waterproof layer, an anti-aging layer, a fire-resistant layer and a flame-retardant layer, the flame-retardant layer is in contact with the shielding layer, the fire-resistant layer is arranged outside the flame-retardant layer, the anti-aging layer is arranged outside the fire-resistant layer, the waterproof layer is arranged outside the anti-aging layer, and the waterproof layer, anti-aging layer, fire-resistant layer and flame-retardant layer are arranged as a whole.

[0010] Preferably, the filling layer is arranged at the gaps between the four wire cores, and the four wire cores are arranged equidistantly in a circle, and the filling layer is made of epoxy resin.

[0011] Preferably, the wrapping layer is made of mica tape, and the inner sheath and the outer sheath are both made of polyethylene rubber.

[0012] Preferably, the outer sheath is subjected to radiation cross-linking treatment.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model device is provided with a composite protective layer, and the composite protective layer is composed of a multilayer structure of polyolefin resin, PVC plastic and ceramic silicone rubber. Polyolefin resin is a thermoplastic synthetic resin with excellent performance. Ceramic silicone rubber has excellent fireproof, flame retardant, low smoke, non-toxic and other characteristics. It can form a dense and hard ceramic layer at high temperature, which can hinder the further spread of flames and play a better protective role in fires. The radiation cross-linking reaction can improve the carbonization of the polymer, thereby improving its flame retardancy. The cable treated with radiation cross-linking has excellent flame retardancy, high heat resistance, and excellent physical and mechanical properties, thereby improving the insulation fire retardancy and flame retardancy of the cable.

[0015] The utility model device arranges a waterproof layer, an anti-aging layer, a fire-resistant layer and a flame-retardant layer. The fire-resistant layer and the flame-retardant layer increase the fire-resistant and flame-retardant properties of the wire core, further improving the fire-resistant and flame-retardant effect of the cable. The waterproof layer increases the waterproof property of the wire core, and the anti-aging layer increases the anti-aging property of the wire core, thereby improving the independent use effect of the wire core. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a cross-sectional view of the wire core of the utility model;

[0018] Figure 3 It is a cross-sectional view of the composite protective layer of the utility model;

[0019] Figure 4 This is a cross-sectional view of the insulation layer of the utility model.

[0020] In the figure: 1. Cable core; 2. Wire core; 3. Filling layer; 4. Wrapping layer; 5. Inner sheath; 6. Armor layer; 7. Composite protective layer; 8. Outer sheath; 9. Conductor; 10. Shielding layer; 11. Insulating layer; 12. Polyolefin resin; 13. PVC plastic; 14. Ceramic silicone rubber; 15. Waterproof layer; 16. Anti-aging layer; 17. Fire-resistant layer; 18. Flame retardant layer. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] See also Figure 1-4 The utility model provides an embodiment: a radiation cross-linked insulated fire-resistant and flame-retardant cable, comprising a cable core 1, the cable core 1 comprising a wire core 2 and a filling layer 3, four wire cores 2 are provided, a sheath 4 is provided on the outside of the cable core 1, and the sheath 4 and the cable core 1 are spirally wound, an inner sheath 5 is provided on the outside of the sheath 4, and the inner sheath 5 and the sheath 4 are formed by extrusion, an armor layer 6 is provided on the outside of the inner sheath 5, and the armor layer 6 is fitted with the inner sheath 5, a composite protective layer 7 is provided on the outside of the armor layer 6, an outer sheath 8 is provided on the outside of the composite protective layer 7, and the armor layer 6, the composite protective layer 7 and the outer sheath 8 are formed by extrusion.

[0023] See also Figure 1 and Figure 2 The core 2 includes a conductor 9, a shielding layer 10 and an insulating layer 11, and the conductor 9 is formed by twisting a plurality of metal wires, the shielding layer 10 is arranged outside the conductor 9, and the insulating layer 11 is arranged outside the shielding layer 10, and the conductor 9, the shielding layer 10 and the insulating layer 11 are formed by extrusion molding, and the core 2 is formed by combining the conductor 9, the shielding layer 10 and the insulating layer 11, and the shielding layer 10 and the insulating layer 11 make the core 2 have shielding and insulating properties.

[0024] See also Figure 1 and Figure 3The composite protective layer 7 includes a polyolefin resin 12, a PVC plastic 13 and a ceramic silicone rubber 14. The PVC plastic 13 is arranged on the outside of the ceramic silicone rubber 14, and the polyolefin resin 12 is arranged on the outside of the PVC plastic 13. The polyolefin resin 12, the PVC plastic 13 and the ceramic silicone rubber 14 are arranged as a whole. The ceramic silicone rubber 14 is in contact with the armor layer 6, and the polyolefin resin 12 is in contact with the outer sheath 8. The polyolefin resin 12, the PVC plastic 13 and the ceramic silicone rubber 14 form a multi-layer composite protective layer 7. The polyolefin resin 12, the PVC plastic 13 and the ceramic silicone rubber 14 all have good fire resistance and flame retardancy, thereby improving the fire resistance and flame retardancy of the cable.

[0025] See also Figure 2 and Figure 4 The insulating layer 11 includes a waterproof layer 15, an anti-aging layer 16, a fire-resistant layer 17 and a flame-retardant layer 18. The flame-retardant layer 18 is in contact with the shielding layer 10. The fire-resistant layer 17 is arranged outside the flame-retardant layer 18. The anti-aging layer 16 is arranged outside the fire-resistant layer 17. The waterproof layer 15 is arranged outside the anti-aging layer 16. The waterproof layer 15, the anti-aging layer 16, the fire-resistant layer 17 and the flame-retardant layer 18 are arranged as a whole. The fire-resistant and flame-retardant properties of the core 2 are increased by the fire-resistant layer 17 and the flame-retardant layer 18, and the fire-resistant and flame-retardant effect of the cable is further improved.

[0026] See also Figure 1 The filling layer 3 is arranged at the gap between the four wire cores 2, and the four wire cores 2 are arranged equidistantly in a circle, and the filling layer 3 is made of epoxy resin.

[0027] See also Figure 1 The wrapping layer 4 is made of mica tape, and the inner sheath 5 and the outer sheath 8 are both made of polyethylene rubber.

[0028] See also Figure 1 The outer sheath 8 is subjected to radiation cross-linking treatment. The radiation cross-linking reaction can improve the carbonization of the polymer, thereby improving its flame retardancy. The cable subjected to radiation cross-linking treatment has excellent flame retardancy, high heat resistance, and excellent physical and mechanical properties.

[0029] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A radiation cross-linked insulated fire-resistant flame-retardant cable, comprising a cable core (1), characterized in that: The cable core (1) comprises a wire core (2) and a filling layer (3), wherein four wire cores (2) are provided, a wrapping layer (4) is provided on the outside of the cable core (1), and the wrapping layer (4) and the cable core (1) are arranged in a spiral winding manner, an inner sheath (5) is provided on the outside of the wrapping layer (4), and the inner sheath (5) and the wrapping layer (4) are formed by extrusion, an armor layer (6) is provided on the outside of the inner sheath (5), and the armor layer (6) and the inner sheath (5) are in contact, a composite protective layer (7) is provided on the outside of the armor layer (6), an outer sheath (8) is provided on the outside of the composite protective layer (7), and the armor layer (6), the composite protective layer (7) and the outer sheath (8) are formed by extrusion.

2. The radiation cross-linked insulated fire-resistant and flame-retardant cable according to claim 1, characterized in that: The wire core (2) comprises a conductor (9), a shielding layer (10) and an insulating layer (11), wherein the conductor (9) is formed by twisting a plurality of metal wires, the shielding layer (10) is arranged outside the conductor (9), the insulating layer (11) is arranged outside the shielding layer (10), and the conductor (9), the shielding layer (10) and the insulating layer (11) are formed by extrusion.

3. The radiation cross-linked insulated fire-resistant and flame-retardant cable according to claim 1, characterized in that: The composite protective layer (7) comprises a polyolefin resin (12), a PVC plastic (13) and a ceramic silicone rubber (14); the PVC plastic (13) is arranged outside the ceramic silicone rubber (14); the polyolefin resin (12) is arranged outside the PVC plastic (13); the polyolefin resin (12), the PVC plastic (13) and the ceramic silicone rubber (14) are arranged as a whole; the ceramic silicone rubber (14) is in contact with the armor layer (6); and the polyolefin resin (12) is in contact with the outer sheath (8).

4. The radiation cross-linked insulated fire-resistant and flame-retardant cable according to claim 2, characterized in that: The insulating layer (11) comprises a waterproof layer (15), an anti-aging layer (16), a fire-resistant layer (17) and a flame-retardant layer (18); the flame-retardant layer (18) is in contact with the shielding layer (10); the fire-resistant layer (17) is arranged outside the flame-retardant layer (18); the anti-aging layer (16) is arranged outside the fire-resistant layer (17); the waterproof layer (15) is arranged outside the anti-aging layer (16); and the waterproof layer (15), the anti-aging layer (16), the fire-resistant layer (17) and the flame-retardant layer (18) are arranged as a whole.

5. The radiation cross-linked insulated fire-resistant and flame-retardant cable according to claim 1, characterized in that: The filling layer (3) is arranged at the gaps between the four wire cores (2), and the four wire cores (2) are arranged equidistantly in a circle. The filling layer (3) is made of epoxy resin.

6. The radiation cross-linked insulated fire-resistant and flame-retardant cable according to claim 1, characterized in that: The wrapping layer (4) is made of mica tape, and the inner sheath (5) and the outer sheath (8) are both made of polyethylene rubber.

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