Three-coaxial shielding cable

Abstract

The utility model relates to a three-coaxial shielding cable, which comprises an inner conductor, an inner insulating layer, an outer conductor, an outer insulating layer, an aluminum foil shielding layer, a steel wire braided shielding layer and an outer sheath which are arranged from inside to outside, and a drainage wire is arranged in the steel wire braided shielding layer. The inner conductor is formed by twisting a plurality of copper wire cores. Reinforcing wire cores are twisted in the centers of the interiors of the plurality of copper wire cores of the inner conductor. And a plurality of fillers are arranged on the peripheries of the plurality of copper wire cores of the inner conductor and the circumference of the inner insulating layer. And a steel belt isolating layer is arranged outside the steel wire braided shielding layer. And a spiral winding armor layer is arranged between the steel belt isolating layer and the outer sheath. The anti-electromagnetic interference performance of the cable can be greatly improved, and the service life of the cable is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric wire and cable, especially a kind of three coaxial shielded cable. BACKGROUND

[0002] Three coaxial cables are composed of inner core (main), inner skin signal layer (outer conductor) and outer skin shielding layer. Inner core mainly transmits video signals and powers the head, and inner skin signal layer (outer conductor) and inner core form a loop, and the outer layer is a shielding layer. Compared with multi-core cables, three coaxial cables have simple structure.

[0003] However, the shielding layer of the existing three coaxial cables has a single-layer structure, which increases the probability of structural cracks with the increase of service time, thereby affecting the shielding performance of the cable. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the deficiency of prior art and provides a three coaxial shielded cable.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] A three coaxial shielded cable comprises an inner conductor, an inner insulating layer, an outer conductor, an outer insulating layer, an aluminum foil shielding layer, a steel wire braided shielding layer and an outer sheath arranged from inside to outside, and a drain wire is arranged in the steel wire braided shielding layer.

[0007] The inner conductor is twisted by a plurality of copper wire cores.

[0008] The inner core of the plurality of copper wire cores is twisted with a reinforcing wire core.

[0009] A plurality of filling bodies are arranged on the periphery of the plurality of copper wire cores and the circumference of the inner insulating layer.

[0010] A steel belt isolation layer is arranged outside the steel wire braided shielding layer.

[0011] A spiral wrapping armor layer is arranged between the steel belt isolation layer and the outer sheath.

[0012] The filling body has an elliptical structure.

[0013] The utility model has the advantages of greatly improving the anti-electromagnetic interference performance of the cable and prolonging its service life. DRAWING DESCRIPTION

[0014] Fig. 1 The drawing is a structural schematic view of the utility model;

[0015] Fig. 2 The drawing is a schematic view of the spiral wrapping armor layer in the utility model;

[0016] In the diagram: 1-Inner conductor; 2-Inner insulation layer; 3-Outer conductor; 4-Outer insulation layer; 5-Aluminum foil shielding layer; 6-Steel wire braided shielding layer; 7-Outer sheath; 8-Drain wire; 9-Reinforcing core; 10-Fill; 11-Steel strip isolation layer; 12-Spiral wound armor layer;

[0017] The following will describe in detail the embodiments of this utility model with reference to the accompanying drawings. Detailed Implementation

[0018] The principles and features of this utility model are described below with reference to the accompanying drawings. The embodiments described are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0019] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0022] like Figs. 1-2 As shown, a triaxial shielded cable includes an inner conductor 1, an inner insulation layer 2, an outer conductor 3, an outer insulation layer 4, an aluminum foil shielding layer 5, a steel wire braided shielding layer 6, a steel tape isolation layer 11, a spiral wound armor layer 12, and an outer sheath 7, arranged from the inside out.

[0023] The inner conductor 1 is made of several copper wire cores twisted together.

[0024] The inner conductor 1 has several copper wire cores with reinforcing wire cores 9 twisted together in the center, which can improve the tensile strength of the cable.

[0025] The periphery of the copper wire core of the inner conductor 1 is provided with a plurality of filling bodies 10 in the circumference of the inner insulation layer 2, and the filling bodies 10 are in an elliptical structure.

[0026] The aluminum foil shielding layer 5 and the steel wire braided shielding layer 6 can form two-stage shielding on electromagnetic interference, and achieve good anti-electromagnetic interference effect.

[0027] The steel wire braided shielding layer 6 is provided with a drainage wire 8. The drainage wire 8 can lead the interference current to the ground, and can play an anti-electromagnetic interference role. The drainage wire 8 can be a tinned copper drainage wire.

[0028] The steel belt isolation layer 11 can avoid the cable being pierced, and strengthens the performance of the cable.

[0029] The spiral wound armor layer 12 is an armor layer composed of soft steel belts. The steel belt armor is arranged outside the steel belt isolation layer 11 in a spiral wrapping mode. The steel wires of the spiral armor are in close contact, which can improve the bending resistance of the cable and avoid serious bending deformation.

[0030] The steel belt isolation layer 11 and the spiral wound armor layer 12 can form an armor on one hand, and can also play a role in shielding electromagnetic on the other hand.

[0031] The utility model can greatly improve the anti-electromagnetic interference performance of the cable and improve the service life.

[0032] The utility model has been described above in conjunction with the drawings, and obviously, the specific implementation of the utility model is not limited by the above mode. As long as various improvements are made by adopting the method concept and technical scheme of the utility model, or direct application in other occasions without improvement, they are within the protection scope of the utility model.

Claims

1. A triaxial shielded cable, characterized in that, It includes an inner conductor (1), an inner insulation layer (2), an outer conductor (3), an outer insulation layer (4), an aluminum foil shielding layer (5), a steel wire braided shielding layer (6), and an outer sheath (7), arranged from the inside out. The steel wire braided shielding layer (6) is provided with a drain wire (8).

2. The triaxial shielded cable according to claim 1, characterized in that, The inner conductor (1) is made of several copper wire cores twisted together.

3. A triaxial shielded cable according to claim 2, characterized in that, The inner conductor (1) has several copper wire cores with reinforcing wire cores (9) twisted together at the center.

4. A triaxial shielded cable according to claim 3, characterized in that, The inner conductor (1) has several copper wire cores around its periphery and the inner insulation layer (2) has several fillers (10).

5. A triaxial shielded cable according to claim 4, characterized in that, A steel strip isolation layer (11) is provided outside the steel wire braided shielding layer (6).

6. A triaxial shielded cable according to claim 5, characterized in that, A spiral-wound armor layer (12) is provided between the steel strip isolation layer (11) and the outer sheath (7).

7. A triaxial shielded cable according to claim 6, characterized in that, The filling body (10) has an elliptical structure.

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