Copper wire shielding aluminum wire armored cable

Abstract

The utility model discloses a copper wire shielding aluminum wire armored cable, which comprises a conductor, a conductor shielding layer, an insulating layer and an insulating shielding layer, the conductor is formed by twisting a plurality of copper wires, the conductor shielding layer is made of a semiconductor material, the insulating layer is formed by extruding a cross-linked polyethylene material outside the conductor shielding layer, and the insulating shielding layer is made of a polyethylene material. A copper wire shielding layer, a tightening layer, a flame-retardant layer I, an isolating layer, a flame-retardant layer II, an armor layer, a flame-retardant layer III and an outer sheath are sequentially arranged outside the insulation shielding layer from inside to outside, the insulation shielding layer is formed by extruding a semi-conductive material, the copper wire shielding layer is formed by winding copper wires, and the armor layer is formed by winding aluminum wires; according to the utility model, the copper wire structure is adopted for shielding, the armor layer wound by the aluminum wires is adopted for protection, the cable with the structure has the mechanical characteristics of higher tensile strength, compressive strength and the like, and the service life of the cable is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of cable structures, in particular to a copper wire shielded aluminum wire armored cable. Background Art

[0002] The mechanical protective layer of armored cable increases the cable's mechanical strength and corrosion resistance, making it suitable for applications susceptible to mechanical damage and corrosion. Armored cable can be laid in a flexible manner, with fixed installation being the most common method for power cables. Natural advantages of armored cable include enhanced tensile and compressive strength, mechanical protection, and a longer service life.

[0003] The armor layer of common armored cables is made of round steel wire, etc., and its main disadvantages are:

[0004] 1. For installation locations with strict outer diameter restrictions (such as pipelines, bridges, etc.), the outer diameter of round steel wire armored cables with the same specifications (conductor current carrying capacity) is larger;

[0005] 2. An increase in outer diameter means more material consumption and higher costs. Therefore, the material cost of the outer sheath of round steel wire armored cables with the same specifications and structure is higher, and the overall cost is higher;

[0006] 3. Round steel wire is magnetic, and is prone to magnetic loss in certain applications, especially in alternating electric fields.

[0007] In view of the above problems, the utility model provides a copper wire shielded aluminum wire armored cable. Utility Model Content

[0008] The utility model aims to provide a copper wire shielded aluminum wire armored cable.

[0009] The above technical objectives of the present invention are achieved through the following technical solutions:

[0010] A copper wire shielded aluminum wire armored cable, comprising a conductor, a conductor shielding layer, an insulating layer, and an insulating shielding layer. The conductor is formed by twisting multiple copper wires together, the conductor shielding layer is made of a semiconductor material, and the insulating layer is formed by extruding a cross-linked polyethylene material on the outside of the conductor shielding layer. The outside of the insulating shielding layer is provided with a copper wire shielding layer, a tightening layer, a first flame retardant layer, an isolation layer, a second flame retardant layer, an armoring layer, a third flame retardant layer, and an outer sheath in sequence from the inside to the outside. The insulating shielding layer is extruded with a semi-conductive material, the copper wire shielding layer is formed by winding copper wire, and the armoring layer is formed by combing aluminum wire.

[0011] Furthermore, the flame retardant layer 1, the flame retardant layer 2 and the flame retardant layer 3 are all wrapped with halogen-free flame retardant tape. The three-layer flame retardant structure effectively improves the flame retardant effect of the cable and can ensure its use in harsh environments.

[0012] Furthermore, the tightening layer is formed by reversely winding the copper tape and the copper wire of the copper wire shielding layer to form a tightening structure, thereby preventing the internal structure such as the copper wire shielding layer from loosening.

[0013] Furthermore, the isolation layer is made of polyolefin material, which has good mechanical properties, is not easily broken by force, has high stability to water, and is not easily corroded by water.

[0014] Furthermore, the outer sheath is made of cross-linked polyethylene material coated on the outside of the flame retardant layer 3, which has the advantages of good heat resistance and high mechanical strength, and effectively protects the outside of the cable.

[0015] To sum up, the utility model has the following beneficial effects: the utility model adopts a copper wire structure for shielding, and adopts an armor layer of aluminum wire combing for protection on the outside. The cable of this structure has high mechanical properties such as tensile strength and compressive strength, which extends the service life of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the internal structure of the utility model cable;

[0017] Figure 2 It is a partial enlarged view of the cross-sectional view of the cable of the present invention.

[0018] In the figure, 1. Conductor; 2. Conductor shielding layer; 3. Insulation layer; 4. Insulation shielding layer; 5. Copper wire shielding layer; 6. Binding layer; 7. Flame retardant layer 1; 8. Isolation layer; 9. Flame retardant layer 2; 10. Armor layer; 11. Flame retardant layer 3; 12. Outer sheath. DETAILED DESCRIPTION

[0019] The following is a further detailed description of the present invention in conjunction with the accompanying drawings, clearly and completely describing the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] like Figure 1 and 2As shown, a copper wire shielded aluminum wire armored cable includes a conductor 1, a conductor shielding layer 2 and an insulating layer 3. The conductor 1 is formed by twisting multiple copper wires together, the conductor shielding layer 2 is made of semiconductor material, and the insulating layer 3 is formed by extruding a cross-linked polyethylene material on the outside of the conductor shielding layer 2. The outside of the insulating shielding layer 4 is provided with a copper wire shielding layer 5, a tightening layer 6, a flame retardant layer 7, an isolation layer 8, a flame retardant layer 9, an armor layer 10, a flame retardant layer 3 11 and an outer sheath 12 from the inside to the outside. The insulating shielding layer 4 is extruded with a semi-conductive material, the copper wire shielding layer 5 is wound with copper wire, and the armor layer 10 is combed with aluminum wire.

[0021] Furthermore, the flame retardant layer 1 7 , the flame retardant layer 2 9 and the flame retardant layer 3 11 are all wrapped with halogen-free flame retardant tape. The three-layer flame retardant structure effectively improves the flame retardant effect of the cable and can ensure its use in harsh environments.

[0022] Furthermore, the tightening layer 6 is formed by reversely winding the copper tape and the copper wire of the copper wire shielding layer 5 to form a tightening structure, thereby preventing the internal structure such as the copper wire shielding layer 5 from loosening.

[0023] Furthermore, the isolation layer 8 is made of polyolefin material, which has good mechanical properties, is not easily broken by stress, has high stability to water, and is not easily corroded by water.

[0024] Furthermore, the outer sheath 12 is made of cross-linked polyethylene material coated on the outside of the flame retardant layer 11, which has the advantages of good heat resistance and high mechanical strength, and effectively protects the outside of the cable.

[0025] The utility model adopts a copper wire structure for shielding, and adopts an armor layer of aluminum wire combing for protection on the outside. The cable of this structure has high mechanical properties such as tensile strength and compressive strength, thereby extending the service life of the cable.

[0026] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A copper wire shielded aluminum wire armored cable, comprising a conductor (1), a conductor shielding layer (2) and an insulating layer (3), wherein the conductor (1) is formed by twisting a plurality of copper wires together, the conductor shielding layer (2) is made of a semiconductor material, and the insulating layer (3) is formed by coating the conductor shielding layer (2) with a rubber material, characterized in that: The outside of the insulating layer (3) is provided with a copper wire shielding layer (5), a tightening layer (6), a flame retardant layer 1 (7), an isolation layer (8), a flame retardant layer 2 (9), an armor layer (10), a flame retardant layer 3 (11) and an outer sheath (12) in sequence from the inside to the outside. The insulating shielding layer (4) is formed by wrapping mica tape, the copper wire shielding layer (5) is formed by winding copper wire, and the armor layer (10) is woven by aluminum wire; the flame retardant layer 1 (7), the flame retardant layer 2 (9) and the flame retardant layer 3 (11) are all wrapped by halogen-free flame retardant tape; the tightening layer (6) is formed by winding copper tape in the opposite direction to the copper wire of the copper wire shielding layer (5).

2. The copper wire shielded aluminum wire armored cable according to claim 1, characterized in that: The isolation layer (8) is made of polyolefin material.

3. The copper wire shielded aluminum wire armored cable according to claim 2, characterized in that: The outer sheath (12) is made of cross-linked polyethylene material and is coated on the outside of the third flame retardant layer (11).

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