Flexible mineral insulated rat-proof and termite-proof fireproof cable

Abstract

The utility model discloses a flexible mineral insulation rat-proof termite-proof fireproof cable, comprising a cable core, the cable core comprises a wire core and a filling layer, the outside of the cable core is provided with a wrapping layer, the wrapping layer and the cable core are in spiral winding connection, the outside of the wrapping layer is provided with an inner protection layer, and the inner protection layer and the wrapping layer are formed through extrusion. The composite fireproof layer is arranged outside the inner protection layer, the outer sheath is arranged outside the composite fireproof layer, the outer sheath and the composite fireproof layer are formed through extrusion, the fireproof layer of the fireproof cable is of a multi-layer structure, the fireproof performance of the cable is greatly improved, the glass fiber net layer is arranged inside the outer sheath, and therefore the cable can be prevented from being bitten by rats and ants; and the repellent coating coated on the outer wall gnawing by the rats and the ants can repel the rats and the ants when the rats and the ants bite the fireproof cable, so that the service life of the fireproof cable is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a flexible mineral insulated rat-proof, ant-proof and fire-proof 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. Fire-resistant cables refer to cables that, under specified test conditions, after the sample is burned and the test fire source is removed, the spread of the flame is limited to a limited range, and the residual flame or residual burning can be extinguished by itself within a limited time.

[0003] The Chinese patent publication number is CN221281795U, and the authorization announcement date is July 5, 2024. A flexible mineral insulated anti-rat and ant fireproof cable includes a cable core and a composite sheath extruded outside the cable core. The cable core includes four wire cores and a low-smoke zero-halogen filling strip arranged between the four wire cores. The wire core includes a conductor and a fire-resistant layer extruded outside the conductor. The composite sheath includes an aluminum tube coating extruded outside the four wire cores, an isolation layer extruded outside the aluminum tube coating, an oxygen-insulating layer coated outside the isolation layer, and a low-smoke zero-halogen anti-rat and ant outer sheath extruded outside the oxygen-insulating layer. The utility model aims to improve the existing technology that the overall cable structure is very hard, easily affected by natural forces and electric forces, and easily causes insulation displacement when bending, affecting electrical performance. The utility model has the advantages of good flexibility, good high temperature resistance and fireproof effect, and enhanced anti-rat and ant performance.

[0004] The fireproof layer structure of the existing fireproof cable is single, and the anti-rat and ant sheath layer is formed by drawing, which can play a certain degree of anti-rat and ant effect. However, the cable is damaged by repeated rat and ant bites, and the flame retardant effect is affected to a certain extent, which reduces the safety of power cable use and cannot meet the use requirements. Utility Model Content

[0005] The purpose of the utility model is to provide a flexible mineral insulated rat-proof and ant-proof fireproof cable to solve the problem proposed in the above background technology that the fireproof layer structure of the existing fireproof cable is single, the rat-proof and ant-proof sheath layer is formed by drawing, which can play a certain degree of rat-proof and ant-proof effect, and the cable is damaged by repeated rat-ant gnawing, and the flame retardant effect is affected to a certain extent, which reduces the safety of power cable use and cannot meet the use requirements.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flexible mineral insulated rat-proof and ant-proof fireproof cable, comprising a cable core, the cable core comprising a wire core and a filling layer, a sheath layer is arranged on the outside of the cable core, and the sheath layer is spirally wound and connected to the cable core, an inner protective layer is arranged on the outside of the sheath layer, and the inner protective layer and the sheath layer are formed by extrusion, a composite fireproof layer is arranged on the outside of the inner protective layer, an outer sheath is arranged on the outside of the composite fireproof layer, and the outer sheath and the composite fireproof layer are formed by extrusion.

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

[0008] Preferably, the composite fireproof layer comprises a fire-resistant layer, a flame-retardant layer and an oxygen-isolating layer, and the oxygen-isolating layer is in contact with the inner protective layer, the flame-retardant layer is arranged outside the oxygen-isolating layer, and the fire-resistant layer is arranged outside the flame-retardant layer.

[0009] Preferably, the outer sheath includes a first sheath layer, a glass fiber mesh layer and a second sheath layer, and the first sheath layer is in contact with the fire-resistant layer, the second sheath layer is arranged on the outside of the first sheath layer, the glass fiber mesh layer is arranged between the first sheath layer and the second sheath layer, and the glass fiber mesh layer is arranged as a whole with the first sheath layer and the second sheath layer.

[0010] Preferably, a repellent coating is coated on the outer wall of the second sheath layer.

[0011] Preferably, there are three cores, and the three cores are equidistantly arranged in a triangle inside the cable core, and the filling layer is arranged in the gaps between the three cores.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model device is provided with a composite fireproof layer, and the composite fireproof layer is composed of a fireproof layer, a flame retardant layer and an oxygen-isolating layer to form a multilayer structure. The fireproof layer is made of polyethylene, which has good fire resistance. The polyethylene is subjected to radiation cross-linking treatment. Radiation cross-linking is to irradiate polyethylene with ionizing radiation to form chemical bonds or strong physical bonding points between its macromolecular chains, thereby generating a three-dimensional network structure polymer with a higher molecular weight, thereby improving the fire resistance of polyethylene. The flame retardant layer is made of ceramic silicone rubber, which has excellent fireproof, flame retardant, low smoke, non-toxic and other characteristics. At high temperatures, the ceramic powder will react with the silicone rubber to form a self-supporting ceramic body, thereby playing a fireproof role, and will not produce toxic waste gas or harmful solution, thereby avoiding secondary pollution to the surrounding environment after a fire. The oxygen-isolating layer is made of polyolefin, which has good high temperature resistance and oxygen isolation performance, can maintain structural stability at high temperatures, isolate oxygen, and prevent further combustion of the cable.

[0014] The utility model device is provided with an outer sheath, and the outer sheath is composed of a first sheath layer, a glass fiber mesh layer and a second sheath layer to form a multi-layer structure. The glass fiber mesh layer is embedded in the inner part of the outer sheath, which can not only improve the structural strength of the outer sheath, but also prevent rats and ants from gnawing through the outer sheath. The repellent coating produces discomfort to the plague, and when rats and ants gnaw on the outer sheath, they are promptly repelled. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a cross-sectional view of the cable core of the utility model;

[0017] Figure 3 This is a structural diagram of the composite fireproof layer of the utility model;

[0018] Figure 4 This is a structural diagram of the outer sheath of the present utility model.

[0019] In the figure: 1. Cable core; 2. Wire core; 3. Filling layer; 4. Wrapping layer; 5. Inner sheath; 6. Composite fireproof layer; 7. Outer sheath; 8. Conductor; 9. Shielding layer; 10. Insulation layer; 11. Isolation layer; 12. Fire-resistant layer; 13. Flame retardant layer; 14. Oxygen barrier layer; 15. First sheath layer; 16. Glass fiber mesh layer; 17. Second sheath layer; 18. Repellent coating. DETAILED DESCRIPTION

[0020] 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.

[0021] See also Figure 1-4The utility model provides an embodiment: a flexible mineral insulated anti-rat and ant fireproof cable, comprising a cable core 1, the cable core 1 comprising a wire core 2 and a filling layer 3, three wire cores 2 are arranged in a triangular shape and equidistantly inside the cable core 1, the filling layer 3 is arranged at the gap between the three wire cores 2, a sheath 4 is arranged outside the cable core 1, and the sheath 4 is spirally wound and connected with the cable core 1, an inner sheath 5 is arranged outside the sheath 4, and the inner sheath 5 and the sheath 4 are extruded into a Type, a composite fireproof layer 6 is arranged outside the inner protective layer 5, an outer sheath 7 is arranged outside the composite fireproof layer 6, and the outer sheath 7 and the composite fireproof layer 6 are formed by extrusion, the core 2 includes a conductor 8, a shielding layer 9, an insulating layer 10 and an isolation layer 11, the conductor 8 is formed by twisting a plurality of copper wires, the shielding layer 9 is arranged outside the conductor 8, and the shielding layer 9 and the conductor 8 are formed by extrusion, the insulating layer 10 is arranged outside the shielding layer 9, and the isolation layer 11 is arranged outside the insulating layer 10.

[0022] See also Figure 1 and Figure 3 The composite fireproof layer 6 includes a fireproof layer 12, a flame retardant layer 13 and an oxygen barrier layer 14, and the oxygen barrier layer 14 is attached to the inner protective layer 5, the flame retardant layer 13 is arranged outside the oxygen barrier layer 14, and the fireproof layer 12 is arranged outside the flame retardant layer 13. The composite fireproof layer 6 is a multi-layer structure. The fireproof layer 12 is made of polyethylene, which has good fire resistance. The polyethylene is subjected to radiation cross-linking treatment. Radiation cross-linking is to use ionizing radiation to irradiate polyethylene to form chemical bonds or strong physical bonding points between its macromolecular chains, thereby generating a three-dimensional network structure with a higher molecular weight. The flame retardant layer 13 is made of ceramic silicone rubber, which has excellent fire resistance, flame retardancy, low smoke and non-toxic properties. At high temperatures, the ceramic powder reacts with the silicone rubber to form a self-supporting ceramic body, thereby playing a fire prevention role. No toxic waste gas or harmful solution will be generated, thereby avoiding secondary pollution to the surrounding environment after a fire. The oxygen barrier layer 14 is made of polyolefin, which has good high temperature resistance and oxygen barrier properties, can maintain structural stability at high temperatures, isolate oxygen, and prevent further burning of the cable.

[0023] See also Figure 1 and Figure 4The outer sheath 7 includes a first sheath layer 15, a glass fiber mesh layer 16 and a second sheath layer 17, and the first sheath layer 15 is in contact with the fire-resistant layer 12, the second sheath layer 17 is arranged on the outside of the first sheath layer 15, the glass fiber mesh layer 16 is arranged between the first sheath layer 15 and the second sheath layer 17, and the glass fiber mesh layer 16 is integrated with the first sheath layer 15 and the second sheath layer 17, and the outer wall of the second sheath layer 17 is coated with a repellent coating 18, and the glass fiber mesh layer 16 is embedded in the inner part of the outer sheath 7, which can not only improve the structural strength of the outer sheath 7, but also prevent rats and ants from gnawing through the outer sheath 7. The repellent coating 18 causes discomfort to rats and ants, and they are promptly repelled when they gnaw on the outer sheath 7.

[0024] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0025] 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 flexible mineral insulated rat-proof, ant-proof and fire-proof cable, comprising a cable core (1), characterized in that: The cable core (1) comprises a wire core (2) and a filling layer (3); a wrapping layer (4) is arranged outside the cable core (1), and the wrapping layer (4) is spirally wound and connected to the cable core (1); an inner protective layer (5) is arranged outside the wrapping layer (4), and the inner protective layer (5) and the wrapping layer (4) are formed by extrusion; a composite fireproof layer (6) is arranged outside the inner protective layer (5), and an outer sheath (7) is arranged outside the composite fireproof layer (6), and the outer sheath (7) and the composite fireproof layer (6) are formed by extrusion.

2. A flexible mineral insulated rat-proof, ant-proof and fire-proof cable according to claim 1, characterized in that: The wire core (2) comprises a conductor (8), a shielding layer (9), an insulating layer (10) and an isolating layer (11); the conductor (8) is formed by twisting a plurality of copper wires; the shielding layer (9) is arranged outside the conductor (8), and the shielding layer (9) and the conductor (8) are formed by extrusion; the insulating layer (10) is arranged outside the shielding layer (9); and the isolating layer (11) is arranged outside the insulating layer (10).

3. A flexible mineral insulated rat-proof, ant-proof and fire-proof cable according to claim 1, characterized in that: The composite fireproof layer (6) comprises a fireproof layer (12), a flame retardant layer (13) and an oxygen-isolating layer (14), wherein the oxygen-isolating layer (14) is in contact with the inner protective layer (5), the flame retardant layer (13) is arranged outside the oxygen-isolating layer (14), and the fireproof layer (12) is arranged outside the flame retardant layer (13).

4. A flexible mineral insulated rat-proof, ant-proof and fire-proof cable according to claim 1, characterized in that: The outer sheath (7) comprises a first sheath layer (15), a glass fiber mesh layer (16) and a second sheath layer (17), wherein the first sheath layer (15) is in contact with the fire-resistant layer (12), the second sheath layer (17) is arranged outside the first sheath layer (15), the glass fiber mesh layer (16) is arranged between the first sheath layer (15) and the second sheath layer (17), and the glass fiber mesh layer (16) is arranged as a whole with the first sheath layer (15) and the second sheath layer (17).

5. A flexible mineral insulated rat-proof, ant-proof and fire-proof cable according to claim 4, characterized in that: The outer wall of the second sheath layer (17) is coated with a repellent coating (18).

6. A flexible mineral insulated rat-proof, ant-proof and fire-proof cable according to claim 1, characterized in that: Three wire cores (2) are provided, and the three wire cores (2) are arranged equidistantly in a triangular shape inside the cable core (1), and the filling layer (3) is arranged in the gaps between the three wire cores (2).

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