CN209822301U - Shielded cable - Google Patents

Abstract

The utility model discloses a shielded cable, it includes cable body, shielding layer and restrictive coating, and the cable body is wrapped up in to the shielding layer, and the cable body includes the electric wire and is used for the drain wire of ground connection. The drain wire and the conducting wire which are conveniently grounded are designed to be combined and arranged in the shielding layer in parallel, so that the anti-interference performance is improved. The utility model discloses it is rational in infrastructure, but wide application in cable technical field.

Description

Shielded cable

Technical Field

The utility model relates to a cable technical field, in particular to shielded cable.

Background

The wire and cable industry is the second major industry in China, which is second to the automobile industry, and the product is widely applied to electric power, communication and related transmission purposes. The shielding cable is a transmission line formed by wrapping a signal line by adopting a net-shaped or strip-shaped metal layer, and the shielding is used for ensuring the transmission performance of the system in an electromagnetic interference environment.

A conventional shielding cable is formed by covering a signal line with a metal material to filter out external electromagnetic waves. However, a metal shielding layer alone is not sufficient, and what is more important is that the shielding layer has a good grounding to effectively conduct the interference current to the ground. However, the shielding system has some difficulties that cannot be ignored in actual construction, and due to the harsh requirement of the shielding system on grounding, poor grounding is easily caused, such as overlarge grounding resistance, unbalanced grounding potential and the like, so that a potential difference is generated between two points of the transmission system, and further current on the metal shielding layer is generated, so that the shielding layer is discontinuous, and the integrity of the shielding layer is damaged. In this case, the shielding layer itself is a largest source of interference, and thus the performance of the shielding layer is much inferior to that of the unshielded system.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a shielded cable, the technical scheme who adopts as follows:

the utility model provides a shielded cable, includes cable body, shielding layer and restrictive coating, and the cable body is wrapped up in to the shielding layer, and the cable body includes electric wire and the drain wire that is used for ground connection.

Further, the electric wire includes conductor portion, and the conductor portion outside cladding has the insulating layer, and conductor portion includes a plurality of strands of copper wires.

Further, an isolation layer is arranged between the shielding layer and the sheath layer, and the isolation layer is a resin film component.

Furthermore, the shielding layer is wrapped by the isolation layer in a longitudinal wrapping mode, and two ends of the isolation layer are folded.

Further, the restrictive coating is around the package form.

Further, the drain wire comprises a number of strands of copper wire.

Further, the shielding layer is an aluminum foil tape.

Furthermore, the shielding layer wraps the cable body in a wrapping or longitudinal wrapping mode.

Further, an adhesive tape is disposed on the outer side of the shielding layer.

Further, an adhesive tape is disposed on the inner side of the sheath layer.

Has the advantages that: the drain wire that the design makes things convenient for ground connection combines with the wire, and the two parallel arrangement improves the interference killing feature in the shielding layer. The utility model discloses it is rational in infrastructure, but wide application in cable technical field.

Drawings

Fig. 1 is a cross-sectional view of a shielded cable.

Detailed Description

The present invention will be further described with reference to fig. 1.

The utility model relates to a shielded cable, it includes cable body, shielding layer 11 and restrictive coating 12, and restrictive coating 12 is outside, and the cable body is wrapped up in to shielding layer 11, and the cable body includes the electric wire and is used for the drain wire 13 of ground connection, and the quantity of electric wire can be one or many. The electric wire comprises a conductor part 14, an insulating layer 15 is coated on the outer side of the conductor part 14, the conductor part 14 comprises a plurality of strands of copper wires, and the conductor part 14 can be formed by hinging 37 strands of copper wires.

The drain wire 13 comprises a plurality of strands of copper wires, the structure of the drain wire 13 is consistent with that of the conductor part 14, and the drain wire can also be formed by hinging 37 strands of copper wires.

The shielding layer 11 is an aluminum foil tape, the thickness of the shielding layer 11 is 0.10mm, the texture is soft, the processing is convenient, and the cost is low. Shielding layer 11 is around wrapping the form and wraps up the cable body, and shielding layer 11 adopts around the package mode processing, and shielding layer 11's width is 24mm, and the bonding overlap degree is 30% at least. The aluminum foil has a shielding function, and the shielding density of the aluminum foil can reach 100% in a wrapping mode. An adhesive tape is arranged on the outer side of the shielding layer 11, so that no gap is generated between the shielding layers 11 when the shielding cable is bent, the anti-interference performance is greatly guaranteed, and the adhesive tape is made of rubber.

Or, shielding layer 11 becomes to indulge the package form and wraps the cable body, and shielding layer 11 adopts to indulge the package mode processing, and in the course of working, the degree that uses material length and cable body is unanimous, through the adhesion function, makes the shielding effect reach with unanimous when wrapping the form.

The mode that adopts the shielding layer 11 of drain wire 13 and aluminium foil material to combine realizes the shielding, convenient ground connection, and manufacturing cost is far less than the mode that the shielding was woven to the copper wire and the aluminium foil combination was shielded for use in general moreover.

An isolation layer 16 is arranged between the shielding layer 11 and the sheath layer 12, the isolation layer 16 is a resin film member, and the tensile property, the wear resistance and the flexibility of the resin film are superior to those of the conventional PVC material. The resin film component is in a long strip shape, the thickness is 0.2mm, the width is 28mm, the folded angle position is reserved in the width, the isolation layer 16 is longitudinally wrapped on the shielding layer 11, the two ends of the isolation layer 16 are folded angles, and the folded angles are in the anticlockwise direction. The insulating layer 16 can be ensured to be not easy to loose after being wrapped by the folded angle, the wrapping effect is easy to monitor in the next procedure, and the stability of the structure and the quality is ensured.

The laminated part shown on the shielding layer 11 and the isolation layer 16 is a bonding overlapping part when the shielding layer and the isolation layer are longitudinally wrapped or wrapped.

The inside of sheath layer 12 has arranged the sticky tape, has guaranteed shielded cable overall structure's circularity, and the sticky tape adopts the rubber material. Sheath layer 12 is around the package form, uses around the package mode production sheath layer 12, and the cost is lower, and is applicable to high-speed volume production. The wrapping direction of sheath layer 12 is opposite with the dog-ear direction of isolation layer 16, and the wrapping direction is clockwise, and consequently great to the holistic tension of shielded cable, better assurance shielded cable's inseparable. The sheath layer 12 is made of PVC material, the thickness of the sheath layer 12 is 0.6mm, and the width is 34 mm.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (10)

1. A shielded electrical cable, characterized by: including cable body, shielding layer (11) and restrictive coating (12), arranged isolation layer (16) between shielding layer (11) and restrictive coating (12), cable body is wrapped up in shielding layer (11), and cable body includes electric wire and drain wire (13) that are used for ground connection.

2. The shielded electrical cable of claim 1, wherein: the electric wire comprises a conductor part (14), an insulating layer (15) is coated on the outer side of the conductor part (14), and the conductor part (14) comprises a plurality of strands of copper wires.

3. The shielded electrical cable of claim 1, wherein: the spacer (16) is a resin film member.

4. The shielded electrical cable of claim 3, wherein: the shielding layer (11) is wrapped by the isolation layer (16) in a longitudinal wrapping mode, and two ends of the isolation layer (16) are folded.

5. The shielded electrical cable of claim 1, wherein: the sheath layer (12) is in a wrapping shape.

6. The shielded electrical cable of claim 1, wherein: the drain wire (13) comprises a number of strands of copper wire.

7. The shielded electrical cable of claim 1, wherein: the shielding layer (11) is an aluminum foil tape.

8. The shielded electrical cable of claim 1, wherein: the shielding layer (11) wraps the cable body in a wrapping or longitudinal wrapping mode.

9. The shielded electrical cable of claim 1, wherein: an adhesive tape is arranged on the outer side of the shielding layer (11).

10. The shielded electrical cable of claim 1, wherein: an adhesive tape is disposed on the inner side of the sheath layer (12).