Rat-proof and ant-proof low-voltage power cable

Abstract

The utility model relates to the technical field of cables, in particular to a rat-proof and ant-proof low-voltage power cable, which is characterized in that a flame-retardant composite belt, a ceramic polyolefin oxygen barrier layer, a steel tape armor layer and a polyolefin sheath layer are sequentially coated on the periphery of a plurality of wire cores, and a hard shell is generated when the ceramic polyolefin oxygen barrier layer is burnt under high-temperature flames; and the gaps among the plurality of wire cores are filled with the flame-retardant filling ropes, so that the air content in the cable is reduced under the condition of flame combustion, and the flame-retardant effect is further achieved. The steel tape armoring layer is formed by wrapping galvanized steel tapes on the periphery of the ceramic polyolefin oxygen barrier layer, and at least two layers of galvanized steel tapes are wrapped on the steel tape armoring layer. Through wrapping of the multiple layers of high-strength galvanized steel strips, the cable has the characteristics of shock resistance, tensile resistance, pressure resistance, biological prevention and the like, the cable flame-retardant effect is achieved, meanwhile, the cable is prevented from being bitten by ants and mice, and the current market use requirements are met.

Description

Technical Field

[0001] The present application relates to the field of cable technology, and in particular to a rat- and ant-proof low-voltage power cable. Background Art

[0002] During use, wires and cables are not only subject to environmental damage from oxygen, heat, light, and chemical corrosion, but are also susceptible to gnawing damage from termites, rats, and other organisms. These cables require high flame retardancy, but existing cables cannot meet this requirement, significantly reducing their service life and even causing power outages, fires, and signal interruptions. Therefore, a low-voltage, rat- and rat-resistant power cable is needed to meet current market demands. Utility Model Content

[0003] In order to solve the above technical problems, the present application provides a rat- and ant-proof low-voltage power cable, comprising several wire cores, a flame-retardant composite tape, a ceramic polyolefin oxygen insulation layer, a steel belt armor layer and a polyolefin sheath layer sequentially wrapped around the several wire cores, and the gaps between the several wire cores are filled with flame-retardant filling ropes. The steel belt armor layer is formed by wrapping galvanized steel tape around the outer periphery of the ceramic polyolefin oxygen insulation layer, and at least two layers of the galvanized steel tape are wrapped.

[0004] Preferably, the wire core includes a conductor, a mica tape wrapped around the outer circumference of the conductor, and an insulation layer covering the mica tape.

[0005] Preferably, the insulating layer is formed by extrusion of cross-linked polyethylene material.

[0006] Preferably, the mica tape is wrapped around the surface of the conductor in at least two layers.

[0007] Preferably, the filling rope is a flame retardant PP rope.

[0008] Preferably, the flame retardant composite tape adopts a double-layer wrapping structure, and the wrapping overlap rate is greater than 20%.

[0009] Preferably, there are at least four wire cores and they are symmetrically distributed.

[0010] As can be seen from the above, the following beneficial effects can be obtained by applying the present application: by sequentially coating the outer periphery of several wire cores with a flame-retardant composite tape, a ceramic polyolefin oxygen-isolating layer, a steel tape armor layer, and a polyolefin sheath layer, a hard shell is generated when the ceramic polyolefin oxygen-isolating layer burns under a high-temperature flame, thereby providing fire protection for the internal wire cores; the gaps between the several wire cores are filled with flame-retardant filling ropes, which reduce the air content inside the cable under flame combustion conditions, further achieving a flame-retardant effect. The steel tape armor layer is formed by wrapping a galvanized steel tape around the outer periphery of the ceramic polyolefin oxygen-isolating layer, and at least two layers of galvanized steel tape are wrapped around it. By wrapping multiple layers of high-strength galvanized steel tape, the cable has shock resistance, tensile strength, compressive strength, anti-biological properties, etc., achieving the flame-retardant effect of the cable while preventing damage from ants and rats, meeting the current market demand. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] To more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for describing the embodiments of the present application or the prior art. Obviously, the drawings described below are only part of the embodiments of the present application. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0012] Figure 1 This is a schematic diagram of the structure of the rat and ant-proof low-voltage power cable according to an embodiment of the present application. DETAILED DESCRIPTION

[0013] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0014] Example

[0015] In order to solve the above technical problems, this embodiment provides a rat and ant proof low voltage power cable, such as Figure 1As shown, it includes several wire cores 10, and the outer periphery of the several wire cores 10 is coated with a flame retardant composite tape 20, a ceramic polyolefin oxygen barrier layer 30, a steel belt armor layer 40 and a polyolefin sheath layer 50 in sequence. When the ceramic polyolefin oxygen barrier layer 30 burns under a high-temperature flame, a hard shell is produced, thereby providing fire protection for the internal wire cores 10. The gaps between the several wire cores 10 are filled with flame retardant filling ropes 60, which reduce the air content inside the cable under flame combustion conditions, further achieving a flame retardant effect. The steel belt armor layer 40 is formed by wrapping galvanized steel belt around the outer periphery of the ceramic polyolefin oxygen barrier layer 30, and at least two layers of galvanized steel belt are wrapped. By wrapping multiple layers of high-strength galvanized steel belts, the cable has shock resistance, tensile strength, compressive strength, anti-biological properties, etc., achieving the flame retardant effect of the cable while preventing damage from ants and rats, meeting the current market demand.

[0016] Specifically, the cable has at least four symmetrically distributed cores. The core 10 includes a conductor 11, a mica tape 12 wrapped around the conductor 11, and an insulation layer 13 covering the mica tape 12. The mica tape 12 is wrapped around the conductor 11 in at least two layers. The mica tapes are tightly overlapped, effectively improving the cable's flexibility, fire resistance, and thermal insulation. Furthermore, the insulation layer 13 is extruded from cross-linked polyethylene.

[0017] Furthermore, the filling rope 60 is made of flame-retardant PP rope. Under flame combustion conditions, the filling of the flame-retardant PP rope reduces the air content inside the cable core and lowers the corresponding combustion temperature.

[0018] In the above solution, the flame retardant composite tape 20 adopts a double-layer wrapped structure with an overlapping rate of more than 20%, thereby ensuring the integrity and stability of the internal structure under flame combustion conditions.

[0019] In some embodiments, the polyolefin sheath layer 50 can be made of a rat- and ant-resistant polyolefin material. An exemplary material formula for the rat- and ant-resistant polyolefin material is: EVA: 10-20 parts; HDPE: 80-90 parts; rodent repellent: 2.0-3.0 parts; termite repellent: 1.5-2.5 parts; filler: 10-15 parts; wear-resistant agent: 2.5-4 parts; zinc borate: 5-8 parts; aluminum hydroxide: 20-25 parts; magnesium hydroxide: 12-18 parts; and lubricant: 2-4 parts. This formula offers low smoke, flame retardancy, and excellent rat- and ant-resistant properties, meeting market demand for rat- and ant-resistant low-voltage power cables.

[0020] In summary, the present application scheme sequentially coats the outer periphery of several wire cores with a flame-retardant composite tape, a ceramic polyolefin oxygen-isolating layer, a steel tape armor layer, and a polyolefin sheath layer. When the ceramic polyolefin oxygen-isolating layer burns under a high-temperature flame, a hard shell is produced, thereby providing fire protection for the internal wire cores. The gaps between the several wire cores are filled with flame-retardant filling ropes, which reduce the air content inside the cable under flame combustion conditions, thereby further achieving a flame-retardant effect. The steel tape armor layer is formed by wrapping a galvanized steel tape around the outer periphery of the ceramic polyolefin oxygen-isolating layer, and at least two layers of galvanized steel tape are wrapped around it. By wrapping multiple layers of high-strength galvanized steel tape, the cable has shock resistance, tensile strength, compressive strength, anti-biological properties, etc., achieving the flame-retardant effect of the cable while preventing damage from ants and rats, meeting the current market demand.

[0021] The above-described embodiments do not constitute a limitation on the scope of protection of this technical solution. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the above-described embodiments shall be included in the scope of protection of this technical solution.

Claims

1. A rat and ant proof low voltage power cable, characterized by: The invention comprises a plurality of wire cores (10), a flame retardant composite tape (20) sequentially coated on the plurality of wire cores (10), a ceramic polyolefin oxygen-isolating layer (30), a steel tape armor layer (40) and a polyolefin sheath layer (50), wherein the gaps between the plurality of wire cores (10) are filled with a flame retardant filling rope (60), and the steel tape armor layer (40) is formed by wrapping a galvanized steel tape around the outer periphery of the ceramic polyolefin oxygen-isolating layer (30), and at least two layers of the galvanized steel tape are wrapped around the gaps.

2. The rat and ant proof low voltage power cable according to claim 1, characterized in that: The wire core (10) comprises a conductor (11), a mica tape (12) wrapped around the outer periphery of the conductor (11), and an insulating layer (13) covering the mica tape (12).

3. The rat- and ant-proof low-voltage power cable according to claim 2, characterized in that: The insulating layer (13) is formed by extrusion of cross-linked polyethylene material.

4. The rat and ant proof low voltage power cable according to claim 2, characterized in that: The mica tape (12) is wrapped around the surface of the conductor (11) in at least two layers.

5. The rat and ant proof low voltage power cable according to claim 1, characterized in that: The filling rope (60) is a flame-retardant PP rope.

6. The rat and ant proof low voltage power cable according to claim 1, characterized in that: The flame retardant composite tape (20) adopts a double-layer wrapping structure, and the wrapping overlap rate is greater than 20%.

7. The rat and ant proof low voltage power cable according to claim 1, characterized in that: There are at least four wire cores (10) which are symmetrically distributed.

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