CN214203255U

CN214203255U - Anti-interference data cable

Info

Publication number: CN214203255U
Application number: CN202022588307.1U
Authority: CN
Inventors: 李明星; 孙梁; 张平槐
Original assignee: Hangzhou Xingfa Technology Co ltd
Current assignee: Hangzhou Xingfa Technology Co ltd
Priority date: 2020-11-10
Filing date: 2020-11-10
Publication date: 2021-09-14
Anticipated expiration: 2030-11-10

Abstract

The utility model provides an anti-interference data cable, this anti-interference data cable includes: the cable comprises four wire pairs, a first insulating layer, a first shielding layer, a ground wire, a second shielding layer and a sheath; the wire pair comprises two wires which are twisted, a first insulating layer surrounds the wires, a first shielding layer longitudinally coats the wire pair, and a second shielding layer and a sheath sequentially surround the first shielding layer; the first shielding layer one side of parcel line pair is contradicted each other, and the opposite side supports and leans on the second shielding layer, and the ground wire subsides are established at the second shielding layer inboard. The utility model discloses cladding first insulating layer on the wire that forms the wire pair wraps up the wire pair through first shielding layer, has reduced near-end crosstalk attenuation between the wire pair, has reduced the electromagnetic interference between the transmission line to utilize the mode of second shielding layer parcel first shielding layer to avoid external electromagnetic interference, improved the interference killing feature and the confidentiality of product, alleviateed the time delay problem of cable.

Description

Anti-interference data cable

Technical Field

The utility model relates to a communication cable field especially relates to anti-interference data cable.

Background

With the rapid development of network technology, people have higher and higher requirements on the performance of the integrated wiring system. From traditional audio copper core twisted-pair local area network cable to today's up to gigabit ratio local area network technology, with increasing network speed, it means that the higher the operating frequency, the easier it is to generate electromagnetic radiation and capacitive coupling. Meanwhile, new electromagnetic interference sources are continuously generated in the surrounding environment, the radiation generated when the network working frequency is higher is more serious, and the balance characteristic of the UTP non-shielding data cable is not enough to offset the electromagnetic radiation of the line and the external electromagnetic interference (the electromagnetic compatibility performance can only be met when 30-40 MHz data is transmitted). There is a need for a cable that can effectively shield the line itself from external interference.

SUMMERY OF THE UTILITY MODEL

In order to overcome prior art's not enough, the utility model provides an anti-interference data cable coats the first insulation layer on the wire that forms the wire pair, wraps up the wire pair through first shielding layer, has reduced near-end crosstalk attenuation between the wire pair, has reduced the electromagnetic interference between the transmission line to utilize the mode of second shielding layer parcel first shielding layer to avoid external electromagnetic interference, improved the interference killing feature and the secret performance of product, alleviateed the time delay problem of cable.

In order to solve the above problem, the utility model discloses a technical scheme do: a tamper resistant data cable, the tamper resistant data cable comprising: the cable comprises four wire pairs, a first insulating layer, a first shielding layer, a ground wire, a second shielding layer and a sheath; the wire pair comprises two wires which are twisted, a first insulating layer surrounds the wires, the first shielding layer longitudinally covers the wire pair, and the second shielding layer and the sheath sequentially surround the first shielding layer; wrap up first shielding layer one side mutual conflict of line pair, the opposite side supports and leans on the second shielding layer, the ground wire subsides are established at the second shielding layer inboard.

Further, the conducting wire is a copper wire.

Further, the first insulating layer comprises an inner insulating layer, a foaming insulating layer and an outer insulating layer, and the inner insulating layer, the foaming insulating layer and the outer insulating layer wrap the wire in sequence.

Furthermore, a color strip is arranged outside the first insulating layer, and the first insulating layer and the color strip are formed in one step through a four-layer co-extrusion technology.

Further, the foamed insulation layer is an insulation structure formed by physically foaming polyethylene, and the insulation structure is formed by nitrogen injection.

Further, the first shielding layer and the second shielding layer are aluminum foils, and the thickness of the second shielding layer is the same as that of the first shielding layer.

Further, the width of the first shielding layer is 12mm, and the thickness of the first shielding layer is 0.07 mm.

Further, the width of the second shielding layer is 25mm, and the thickness of the second shielding layer is 0.07 mm.

Further, the ground wire is a tinned copper wire.

Further, the sheath is a low-smoke halogen-free flame-retardant polyolefin sheath.

Compared with the prior art, the beneficial effects of the utility model reside in that: the first insulating layer is coated on the wires forming the wire pairs, the wire pairs are wrapped by the first shielding layer, near-end crosstalk attenuation among the wire pairs is reduced, electromagnetic interference among transmission lines is reduced, external electromagnetic interference is avoided by wrapping the first shielding layer by the second shielding layer, the anti-interference performance and the confidentiality of the product are improved, and the delay problem of the cable is solved.

Drawings

Fig. 1 is a cross-sectional view of an embodiment of the anti-interference data cable of the present invention;

fig. 2 is a cross-sectional view of an embodiment of the conductor and the first insulating layer of the anti-interference data cable of the present invention.

In the figure: 1. a wire; 2. a first insulating layer; 3. a first shielding layer; 4. a ground wire; 5. a second shielding layer; 6. a sheath; 21. an inner insulating layer; 22. foaming the insulating layer; 23. an outer insulating layer.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

Referring to fig. 1-2, fig. 1 is a cross-sectional view of an embodiment of an anti-interference data cable according to the present invention; fig. 2 is a cross-sectional view of an embodiment of the wire and the first insulating layer of the anti-interference data cable of the present invention, wherein the cross-sectional view of fig. 1 is a transverse cross-sectional view of the anti-interference data cable, and the cross-sectional view of fig. 2 is a transverse cross-sectional view of the wire and the first insulating layer, and the anti-interference data cable of the present invention is described in detail with reference to fig. 1-2.

In this embodiment, the tamper resistant data cable includes: four wire pairs, a first insulating layer 2, a first shielding layer 3, a ground wire 4, a second shielding layer 5 and a sheath 6; the wire pair comprises two wires 1 which are twisted, a first insulating layer 2 surrounds the wires 1, a first shielding layer 3 longitudinally covers the wire pair, and a second shielding layer 5 and a sheath 6 sequentially surround the first shielding layer 3; the first shielding layer 3 one side of parcel line pair is contradicted each other, and the opposite side supports and leans on second shielding layer 5, and ground wire 4 pastes and establishes 5 inboards at second shielding layer.

In the present embodiment, the material constituting the conductive wire 1 is a copper wire, and in other embodiments, the material constituting the conductive wire 1 may be aluminum, aluminum alloy, or other materials capable of transmitting data.

In a preferred embodiment, the wire 1 is a copper wire and the diameter of the wire 1 is 0.56 mm.

In the present embodiment, the first insulation layer 2 includes an inner insulation layer 21, a foamed insulation layer 22, and an outer insulation layer 23, and the inner insulation layer 21, the foamed insulation layer 22, and the outer insulation layer 23 sequentially wrap the wire 1. The insulation dielectric constant of the anti-interference data cable is reduced through the first insulation layer 2, wherein the inner insulation layer 21 and the outer insulation layer 23 are solid structures, the foamed insulation layer 22 is an insulation structure formed by physically foamed polyethylene, and the insulation structure is formed in a high-pressure nitrogen injection mode.

In a preferred embodiment, the foamed insulating layer 22 has a diameter of 1.35 mm.

In this embodiment, the first insulating layer 2 is further provided with a color bar, and the first insulating layer 2 and the color bar are formed at one time by a four-layer co-extrusion technology.

In a specific embodiment, the inner insulating layer 21, the foamed insulating layer 22, the outer insulating layer 23, and the color bars are extruded simultaneously by four extruders and formed in one step on one head.

In the present embodiment, the first shielding layer 3 and the second shielding layer 5 are aluminum foils, and the thickness of the second shielding layer 5 is the same as that of the first shielding layer 3.

In a preferred embodiment, the aluminum foil forming the first shielding layer 3 is a strip structure having a width of 12mm and a thickness of 0.07 mm.

In the present embodiment, the foamed insulation layer 22 on the first insulation layer 2, the four-layer co-extrusion technology and the first shielding layer 3 reduce the near-end crosstalk attenuation between the pairs by more than 30%, and the delay is reduced by about 30%.

In a specific embodiment, the second shielding layer 5 is a thickened aluminum foil having an expanded width of 25mm and a thickness of 0.07 mm.

In the present embodiment, the ground wire 4 is a tinned copper wire. In other embodiments, the ground wire 4 may also be made of aluminum, bare copper flexible wire, copper-clad steel, zinc-clad steel, and other conductive materials.

In a preferred embodiment the ground wire 4 is a tin-plated copper wire with a diameter of 0.4 mm.

In this embodiment, the jacket 6 is a low smoke, halogen-free, flame retardant polyolefin jacket. In other embodiments, the jacket 6 may also be constructed of polyvinyl chloride, high density polyethylene, rubber, silicone rubber, polyurethane, and other insulating materials.

In a preferred embodiment, the sheath 6 has a thickness of 0.6mm and a diameter of 7.8 mm.

Through the structure and the material of using, the utility model discloses an anti-interference data cable possesses better anti-interference and anti internal crosstalk's ability than like product, simultaneously greatly reduced the time delay characteristic of product.

Has the advantages that: the utility model discloses an anti-interference data cable cladding first insulation layer on the wire that forms the wire pair, wraps up the wire pair through first shielding layer, has reduced near-end crosstalk attenuation between the wire pair, has reduced the electromagnetic interference between the transmission line to utilize the mode of second shielding layer parcel first shielding layer to avoid external electromagnetic interference, improved the interference killing feature and the confidentiality of product, alleviateed the time delay problem of cable.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tamper-resistant data cable, the tamper-resistant data cable comprising: the cable comprises four wire pairs, a first insulating layer, a first shielding layer, a ground wire, a second shielding layer and a sheath;

the wire pair comprises two wires which are twisted, a first insulating layer surrounds the wires, the first shielding layer longitudinally covers the wire pair, and the second shielding layer and the sheath sequentially surround the first shielding layer;

wrap up first shielding layer one side mutual conflict of line pair, the opposite side supports and leans on the second shielding layer, the ground wire subsides are established at the second shielding layer inboard.

2. The tamper-resistant data cable of claim 1, wherein the conductor is a copper wire.

3. The anti-tamper data cable of claim 1, wherein the first insulating layer comprises an inner insulating layer, a foamed insulating layer, and an outer insulating layer, the inner insulating layer, the foamed insulating layer, and the outer insulating layer sequentially wrapping the wires.

4. The anti-jamming data cable of claim 3, wherein the first insulating layer is further provided with color bars outside, and the first insulating layer and the color bars are formed in one step by a four-layer co-extrusion technology.

5. The tamper-resistant data cable of claim 3, wherein the foamed insulation layer is an insulation structure formed of physically foamed polyethylene, the insulation structure being formed by nitrogen injection.

6. The tamper-resistant data cable of claim 1, wherein the first and second shield layers are aluminum foil, and the second shield layer has a thickness that is the same as the thickness of the first shield layer.

7. The tamper-resistant data cable of claim 1, wherein the first shield layer has a width of 12mm and a thickness of 0.07 mm.

8. The tamper-resistant data cable of claim 1, wherein the second shield layer has a width of 25mm and a thickness of 0.07 mm.

9. The tamper-resistant data cable of claim 1, wherein the ground wire is a tinned copper wire.

10. The tamper-resistant data cable of claim 1, wherein the jacket is a low smoke, zero halogen, flame retardant polyolefin jacket.