Shielded cable

Abstract

The utility model belongs to the technical field of cables, and particularly relates to a shielded cable, which comprises a conductor, the conductor is formed by mutually twisting a plurality of wires, an insulating layer is wrapped outside the conductor, and a filling layer is wrapped outside the insulating layer. The outer side of the filling layer is wrapped with shielding layers layer by layer. According to the utility model, the shielding net is arranged in the shielding layer, the plurality of rows of magnetic beads are arranged in the magnetic bead mounting layer in a surrounding manner, and the conductive coating is coated between the shielding layer and the magnetic bead mounting layer through the conductive coating, so that the influence of a magnetic field effect generated in a cable electrifying process on peripheral cables, equipment and instruments is effectively prevented; the use efficiency and the service life of peripheral related equipment are relatively improved, particularly for high-precision instruments, the accuracy of the cable is further guaranteed, and the situation that the cable is vivid by external electromagnetic waves is also avoided; and the anti-interference capability of the cable can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a shielded cable. Background Art

[0002] Cable is a device for transmitting electric energy or signals, usually composed of several or several groups of wires, which can be insulated from each other. Cables have the characteristics of internal power supply and external insulation, and can be classified according to different uses, structures and materials. The classification of cables is very wide, including power cables, communication cables, control cables, cables for electrical equipment, marine cables, mining cables, etc. They are used to transmit power, signals, control signals, etc., and their application areas involve various fields such as power, communication, construction, industry, and transportation.

[0003] It is inevitable that a magnetic field will be generated around the energized cable, which will cause certain interference to other related cables, equipment or instruments near the cable, thereby affecting the use efficiency and service life of the related equipment and instruments. Therefore, it is necessary to develop a shielded cable. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0006] A shielded cable, comprising:

[0007] A conductor, wherein the conductor is formed by twisting a plurality of wires together, an insulating layer is wrapped around the outer side of the conductor, and a filling layer is wrapped around the outer side of the insulating layer;

[0008] A shielding layer, wherein the outer side of the filling layer is wrapped with a shielding layer layer by layer, the shielding layer is provided with at least one layer, and a grid-shaped shielding net is provided inside the shielding layer, wherein the shielding net comprises a longitudinal metal wire 1 arranged around the conductor at equal intervals, and a transverse metal wire 2 arranged at equal intervals perpendicular to the longitudinal metal wire 1; the longitudinal metal wire 1 is in the shape of a strip and is consistent with the direction of the conductor, the transverse metal wire 2 is in the shape of a ring and is arranged concentrically with the cross section of the conductor, and a plurality of the transverse metal wires 2 are arranged in an up-and-down staggered manner along the longitudinal metal wire 1;

[0009] A magnetic bead mounting layer, wherein the outer side of the insulating layer is wrapped with the magnetic bead mounting layer, the inside of the magnetic bead mounting layer is surrounded by a plurality of rows of magnetic beads with the conductor as the center, each row of the magnetic beads is distributed along the direction of the conductor, and the magnetic beads are arranged in an external contact with each other, a conductive coating is provided between the shielding layer and the magnetic bead mounting layer by coating with conductive paint, a thickening layer is wrapped around the outside of the magnetic bead mounting layer, and a wear-resistant layer is provided on the outside of the thickening layer.

[0010] As a preferred solution of the shielded cable described in the utility model, the insulating layer is made of a material selected from the group consisting of polyurethane, polyvinyl chloride and polypropylene.

[0011] As a preferred solution of the shielded cable described in the utility model, the filling layer is filled with a filling material, and the filling material is one of polypropylene rope, glass fiber rope, asbestos rope and rubber.

[0012] As a preferred solution of the shielded cable described in the utility model, wherein: the shielding layer is connected to a grounding wire, and the grounding wire is connected to the ground.

[0013] As a preferred solution of the shielded cable described in the utility model, wherein: the shielding net is made of conductive material.

[0014] The beneficial effects of the utility model are as follows: by providing a shielding net in the shielding layer, multiple rows of magnetic beads installed in the magnetic bead mounting layer, and providing a conductive coating between the shielding layer and the magnetic bead mounting layer by coating with conductive paint, the magnetic field effect generated during the power-on process of the cable is effectively prevented from affecting surrounding cables, equipment and instruments, and relatively improving the use efficiency and service life of surrounding related equipment. In particular, for high-precision instruments, the accuracy is further guaranteed, and the image of the cable by external electromagnetic waves is avoided; the anti-interference ability of the cable can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the implementation of the utility model, the utility model will be described in detail below in combination with the drawings and detailed implementation. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0016] Figure 1 It is a schematic diagram of the structure of the utility model in a front cross-sectional view;

[0017] Figure 2 This is a schematic diagram of the structure of the shielding net of the utility model;

[0018] Figure 3It is a schematic diagram of the structure of multiple rows of magnetic beads of the utility model. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0020] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0021] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0022] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0023] See also Figure 1-Figure 3 , shows a schematic diagram of the structure of a shielded cable implementation of the utility model, please refer to Figure 1-Figure 3 , a shielded cable is introduced in detail.

[0024] A shielded cable includes a conductor 100, wherein the conductor 100 is formed by twisting a plurality of wires together, an insulating layer 110 is wrapped around the outer side of the conductor 100, and a filling layer 120 is wrapped around the outer side of the insulating layer 110;

[0025] The shielding layer 200 is wrapped around the outer side of the filling layer 120 layer by layer, and the shielding layer 200 is provided with at least one layer. A grid-shaped shielding net 210 is provided inside the shielding layer 200. The shielding net 210 includes a longitudinal metal wire 1 211 arranged around the conductor 100 at equal intervals, and a transverse metal wire 2 212 arranged perpendicular to the longitudinal metal wire 1 211 at equal intervals; the longitudinal metal wire 1 211 is strip-shaped and consistent with the conductor 100, the transverse metal wire 212 is annular and concentric with the cross section of the conductor 100, and a plurality of transverse metal wires 212 are arranged in an up-and-down staggered manner along the longitudinal metal wire 1 211; it can effectively block the interference of the external electromagnetic field;

[0026] The magnetic bead installation layer 300 is wrapped around the outer side of the insulating layer 110, and multiple rows of magnetic beads 310 are arranged around the conductor 100 inside the magnetic bead installation layer 300, and each row of magnetic beads 310 is distributed along the conductor 100, and the magnetic beads 310 are arranged in an external contact with each other; electromagnetic interference signals can be further filtered out to prevent interference from entering the cable; these components can absorb or suppress high-frequency noise and improve the anti-interference ability of the cable system;

[0027] A conductive coating is provided between the shielding layer 200 and the magnetic bead installation layer 300 by coating with a conductive coating, and the conductive coating is a mixture of conductive particles and resin materials; it has good conductivity and adhesion; it can form a uniform conductive shielding film to effectively shield the interference of electromagnetic waves; the magnetic bead installation layer 300 is wrapped with a thickening layer 400 on the outside, and a wear-resistant layer 500 is provided on the outside of the thickening layer 400; the thickening layer 400 and the wear-resistant layer 500 provided by the thickening layer 400 and the wear-resistant layer 500 can improve the overall thickness and wear resistance of the cable, improve the strength of the cable, reduce the damage of the cable, and properly avoid electromagnetic interference from entering the cable; it can improve the anti-interference ability of the cable;

[0028] Furthermore, the insulating layer 110 is a material selected from polyurethane, polyvinyl chloride, and polypropylene; the above-mentioned material is an insulating material with excellent electrical insulation performance and corrosion resistance, and can effectively reduce the influence of electromagnetic interference on the internal signal of the cable;

[0029] Furthermore, the filling layer 120 is filled with a filling material, and the filling material is one of polypropylene rope, glass fiber rope, asbestos rope, and rubber;

[0030] Furthermore, the shielding layer 200 is connected to a grounding wire, which is connected to the ground; thereby introducing interference current into the ground, reducing interference with the internal signal of the cable;

[0031] Furthermore, the shielding net 210 is made of conductive materials, such as copper foil, aluminum foil, and conductive polymer; the above materials are materials with high conductivity and excellent electromagnetic shielding properties, which can absorb and reflect external electromagnetic interference, thereby reducing interference with internal signals of the cable.

[0032] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A shielded cable, characterized in that: include: A conductor (100), wherein the conductor (100) is formed by twisting a plurality of wires together, an insulating layer (110) is wrapped around the outer side of the conductor (100), and a filling layer (120) is wrapped around the outer side of the insulating layer (110); A shielding layer (200), wherein the outer side of the filling layer (120) is wrapped with a shielding layer (200) layer by layer, the shielding layer (200) is provided with at least one layer, and a grid-shaped shielding net (210) is provided inside the shielding layer (200), wherein the shielding net (210) comprises a longitudinal metal wire (211) arranged at equal intervals around the conductor (100) as the center, and a transverse metal wire (212) arranged at equal intervals perpendicular to the longitudinal metal wire (211); the longitudinal metal wire (211) is strip-shaped and runs in the same direction as the conductor (100), the transverse metal wire (212) is ring-shaped and is arranged concentrically with the cross section of the conductor (100), and a plurality of transverse metal wires (212) are arranged in an up-and-down manner along the longitudinal metal wire (211); A magnetic bead mounting layer (300) is provided on the outer side of the insulating layer (110), a plurality of rows of magnetic beads (310) are arranged around a conductor (100) in the interior of the magnetic bead mounting layer (300), each row of the magnetic beads (310) is distributed along the conductor (100), and the magnetic beads (310) are arranged in an externally tangential manner with each other, a conductive coating is provided between the shielding layer (200) and the magnetic bead mounting layer (300) by coating with a conductive coating, a thickening layer (400) is provided on the outside of the magnetic bead mounting layer (300), and a wear-resistant layer (500) is provided on the outside of the thickening layer (400).

2. A shielded cable according to claim 1, characterized in that: The insulating layer (110) is made of a material selected from the group consisting of polyurethane, polyvinyl chloride, and polypropylene.

3. A shielded cable according to claim 1, characterized in that: The filling layer (120) is filled with a filling material, and the filling material is one of polypropylene rope, glass fiber rope, asbestos rope, and rubber.

4. A shielded cable according to claim 1, characterized in that: The shielding layer (200) is connected to a grounding wire, and the grounding wire is connected to the ground.

5. A shielded cable according to claim 1, characterized in that: The shielding net (210) is made of conductive material.

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