CN220569458U

CN220569458U - Net twine

Info

Publication number: CN220569458U
Application number: CN202322160005.8U
Authority: CN
Inventors: 陆飞
Original assignee: Guangdong Yichu Technology Co ltd
Current assignee: Guangdong Yichu Technology Co ltd
Priority date: 2023-08-10
Filing date: 2023-08-10
Publication date: 2024-03-08
Anticipated expiration: 2033-08-10

Abstract

The utility model provides a net wire, which belongs to the technical field of net wires and comprises four twisted pairs, wherein the pitches of the four twisted pairs are respectively 10.5mm to 10.7mm, 11.6mm to 11.8mm, 14.6mm to 14.8mm and 18.6mm to 18.8mm; four aluminum foil shielding layers, wherein the aluminum foil shielding layers are used for coating twisted pairs, and the four twisted pairs are respectively arranged in the four aluminum foil shielding layers; the braided mesh shielding layers are coated outside the four aluminum foil shielding layers and are used for reducing the influence of an external magnetic field on twisted pairs; the outer cover is coated on the outer side of the woven mesh shielding layer; through repeated tests, the utility model finally determines a group of intercept combinations, and by adopting the intercept combinations, the data transmission is stable, and the signal attenuation is smaller when the high-frequency network signal is transmitted.

Description

Net twine

Technical Field

The utility model relates to the technical field of network cables, in particular to a network cable.

Background

The wire cores in the net wires are wound in a pairwise manner, and the net wire twisting distance refers to the length of twisted one section of each pair of the inner wire pair, namely the twisting distance, which is also called the intercept and is used for indicating the degree of tightness of the mutual winding of each pair of the wire pairs.

Each pair of wires in the network cable are twisted in a counter-clockwise direction, and the twisting pitches of each pair are different, so that the mutual twisting changes the original electronic characteristics of the cable, can resist a part of external electromagnetic interference, and can reduce the crosstalk problem caused by own signals.

If the wire cores in the network cable are parallel, signal phase lag is caused when high-frequency network signals are transmitted, attenuation is caused, and a twisted pair mode is adopted because a series inductor is formed at the same time of the capacitor formed by the wire pair.

In theory, in a certain range, the closer the twisting distance of the network cable is, the relatively reduced signal loss degree during signal transmission and the longer the transmission distance. In practice, the lay lengths of each twisted pair are different because coupling interference occurs between adjacent pairs if the twisted pair densities are the same. Each pair of wires is formed with a different lay length to minimize cross-talk between each pair of wires.

The different pitches adopted by each pair of wires have different produced effects, and each manufacturer can determine the optimal intercept combination of the net wires through experiments so as to ensure that the net wires have better transmission effects.

For example, the patent of the utility model issued to CN204229918U discloses a net twine in which the first, second, third and fourth twisted pairs are respectively designed to have a lay length of 17.0mm to 17.3mm, 19.9mm to 20.2mm, 14.8mm to 15.1mm and 22.8mm to 23.1mm, and the first, second, third and fourth twisted pairs are twisted with a lay length of 95mm to 97mm, so that the net twine can achieve better near-end crosstalk loss and return loss transmission characteristics at transmission frequencies up to 500 MHz. The net wire achieves better transmission effect by changing the twisting distance of the net wire.

Because the data of any pair of internal wires is changed, the transmission effect of the network wires can be influenced, the test data volume is large, and better intercept combination is difficult to obtain.

Disclosure of Invention

The utility model provides a network cable, which enables the transmission effect of the network cable to be more stable.

In order to solve the problems, the network cable provided by the utility model adopts the following technical scheme: comprising four twisted pairs, the twist lays of the four twisted pairs being respectively 10.5mm to 10.7mm, 11.6mm to 11.8mm, 14.6mm to 14.8mm and 18.6mm to 18.8mm;

four aluminum foil shielding layers, wherein the aluminum foil shielding layers are used for coating twisted pairs, and the four twisted pairs are respectively arranged in the four aluminum foil shielding layers;

the braided mesh shielding layers are coated outside the four aluminum foil shielding layers and are used for reducing the influence of an external magnetic field on twisted pairs;

and the outer coating is coated on the outer side of the woven mesh shielding layer.

As a further improvement, the four twisted pairs are respectively twisted white orange and orange lines, twisted white green and green lines, twisted white blue and blue lines, and twisted white brown and brown lines;

the pitches of the white orange line and the orange line, the white green line and the green line, the white blue line and the blue line, and the white brown line and the brown line are respectively 10.5mm to 10.7mm, 11.6mm to 11.8mm, 14.6mm to 14.8mm, and 18.6mm to 18.8mm.

As a further improvement, the pitches of the white orange line and the orange line, the white green line and the green line, the white blue line and the blue line, and the white brown line and the brown line are 10.6mm, 11.7mm, 14.7mm, and 18.7mm, respectively.

As a further improvement, the thickness of the aluminum foil shielding layer is 0.1mm.

As a further improvement, the braid density of the braid shielding layer is greater than 60%.

As a further improvement, the woven mesh is a tinned copper wire woven mesh.

As a further improvement, the coating is a PVC coating.

The technical scheme of the utility model has the following beneficial effects:

1. the utility model repeatedly tests, and finally determines a group of intercept combinations, and the intercept combinations are adopted, so that the data transmission is stable, and the signal attenuation is smaller when the medium-high frequency network signal is transmitted.

Drawings

The above, as well as additional purposes, features, and advantages of exemplary embodiments of the present utility model will become readily apparent from the following detailed description when read in conjunction with the accompanying drawings. In the drawings, embodiments of the utility model are illustrated by way of example and not by way of limitation, and like reference numerals refer to similar or corresponding parts and in which:

FIG. 1 is a schematic diagram of a wire structure according to the present utility model;

fig. 2 is a schematic diagram of a twisting structure of four twisted pairs of the inventive wire;

FIG. 3 is a diagram of a detection standard of the network cable of the present utility model;

FIG. 4 is a table of test parameters for the wire of the present utility model;

fig. 5 is an experimental test chart of insertion loss margin of the network cable of the present utility model;

FIG. 6 is a table of test data details for the network cable of the present utility model;

fig. 7 is a data diagram of various experiments with the network cable of the present utility model.

Reference numerals illustrate:

1. a first twisted pair; 2. a second twisted pair; 3. a third twisted pair; 4. and a fourth twisted pair.

Detailed Description

The following description of the embodiments of the present utility model will be made more complete and clear to those skilled in the art by reference to the figures of the embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Various non-limiting embodiments of the utility model are described in detail below. Any number of elements in the figures are for illustration and not limitation, and any naming is used for distinction only and not for any limiting sense.

The principles and spirit of the present utility model are explained in detail below with reference to several representative embodiments thereof.

Embodiment 1 of the network cable provided by the utility model:

as shown in fig. 1 and 2, four twisted pairs are included, namely, a first twisted pair 1, a second twisted pair 2, a third twisted pair 3 and a fourth twisted pair 4, wherein the first twisted pair 1 is a white green wire and a green wire, the second twisted pair 2 is a white brown wire and a brown wire, the third twisted pair 3 is a white orange wire and an orange wire, and the fourth twisted pair 4 is a white blue wire and a blue wire. In this embodiment, the intercept of the first twisted pair 1 is 11.7mm, the intercept of the second twisted pair 2 is 18.7mm, the intercept of the third twisted pair 3 is 10.6mm, and the intercept of the fourth twisted pair 4 is 14.7mm. The intercept combination measured by multiple tests is stable in data transmission, and the signal attenuation is smaller when the medium-high frequency network signal is transmitted.

The aluminum foil shielding layers (the aluminum foil shielding layers, the below-described woven mesh shielding layers, the outer covers and the like are conventional designs in mesh wires, the above components are not improved, the above structures are not shown in the drawings of the specification), and the aluminum foil tube is mainly used for shielding high-frequency electromagnetic waves and preventing the high-frequency electromagnetic waves from being contacted with mesh wire conductors to further generate induced currents and increase crosstalk.

The braided mesh shielding layer is coated outside the four aluminum foil shielding layers, and the braided mesh is generally formed by braiding tinned round copper wires. Mainly prevents the interference of low-frequency electromagnetic waves, and the working principle is the same as that of aluminum foil. The shielding mesh wire using the mesh grid requires the density of the mesh grid to be greater than 60%.

The test experiments for the wire in example 1 were as follows:

in the following net wires, the number 1 is white orange wire, the number 2 is orange wire, the number 3 is white green wire, the number 4 is blue wire, the number 5 is white blue wire, the number 6 is green wire, the number 7 is white brown wire, and the number 8 is brown wire. Wherein 1 and 2 are a group of wire pairs, 3 and 6 are a group of wire pairs, 4 and 5 are a group of wire pairs, and 7 and 8 are a group of wire pairs.

Test standards, instruments, etc. are shown in fig. 3.

Fig. 4 is the measured parameter values of the network cable in example 1.

Fig. 5 is an experimental test chart of the insertion loss margin.

Fig. 6 is a table showing details of each test data of the network cable, and fig. 7 is a data diagram of each test.

While various embodiments of the present utility model have been shown and described herein, it will be obvious to those skilled in the art that such embodiments are provided by way of example only. Many modifications, changes, and substitutions will now occur to those skilled in the art without departing from the spirit and scope of the utility model. It should be understood that various alternatives to the embodiments of the utility model described herein may be employed in practicing the utility model. The appended claims are intended to define the scope of the utility model and are therefore to cover all module forms, equivalents, or alternatives falling within the scope of the claims.

Claims

1. A wire, comprising:

four twisted pairs, the twist lays of the four twisted pairs being 10.5mm to 10.7mm, 11.6mm to 11.8mm, 14.6mm to 14.8mm, and 18.6mm to 18.8mm, respectively;

2. The wire according to claim 1, wherein: the four twisted pairs are respectively twisted white orange line and orange line, twisted white green line and green line, twisted white blue line and twisted white brown line and brown line;

3. The wire according to claim 2, characterized in that: the pitches of the white orange line and the orange line, the white green line and the green line, the white blue line and the blue line, and the white brown line and the brown line are respectively 10.6mm, 11.7mm, 14.7mm and 18.7mm.

4. A wire according to any one of claims 1 to 3, wherein: the thickness of the aluminum foil shielding layer is 0.1mm.

5. A wire according to any one of claims 1 to 3, wherein: the braiding density of the braided mesh shielding layer is more than 60%.

6. The wire according to claim 5, wherein: the mesh grid is a tinned copper wire mesh grid.

7. A wire according to any one of claims 1 to 3, wherein: the coating is a PVC coating.