CN212256968U - Non-shielded cable - Google Patents

Abstract

The application discloses unshielded cable relates to data transmission cable technical field. The unshielded cable includes: the sheath layer is cylindrical, and a hollow cavity is formed inside the sheath layer; the cable core, this cable core setting includes in the cavity: a filler rod disposed in the center of the cavity; a plurality of pairs of twisted wires, wherein the pairs of twisted wires surround the outer side of the filling rod; the ribbon is arranged between the sheath layer and the cable core, and the ribbon separates a gap between the cable core and the sheath layer. This application separates a clearance through setting up the ribbon between restrictive coating and cable core between cable core and the restrictive coating to reduce the contact between cable core and the restrictive coating, reduce the dielectric influence of restrictive coating to the cable core, and then improve the data transmission performance of cable.

Description

Non-shielded cable

Technical Field

The application relates to the field of data transmission cables, in particular to a non-shielded cable.

Background

With the development of communication technology, the application field of data cables is wider and wider, and the requirement on the transmission performance of the data cables is higher and higher. At present, the ultra-5 type non-shielded data cable is widely applied to an Ethernet 10/100/1000BASE-T comprehensive wiring system in wiring, and the data cable is mainly applied to a data center, a machine room and other wiring dense areas in system application. When the data cable is used for data transmission, a data signal is transmitted through a signal transmitter according to a certain coding mode, the data cable is used as a medium, the signal is transmitted to a receiver or a terminal, and then the signal is converted into a signal source needing to be available through a decoder.

The number of pairs of twisted wires in 25 pairs of super 5-class data cable cores in the current market is large, the diameter is too large, the contact area between the cable cores and the sheath is large, so that the cable cores and the sheath generate non-negligible dielectric influence, and the transmission performance of the cable is further weakened.

SUMMERY OF THE UTILITY MODEL

The application aims to provide a non-shielded cable, and the problem that the dielectric influence of a sheath on a cable core is large in the existing large-diameter cable is solved.

In order to achieve the above purpose, the embodiments of the present application adopt the following technical solutions: an unshielded cable comprising: the sheath layer is cylindrical, and a hollow cavity is formed inside the sheath layer; the cable core, this cable core setting includes in the cavity: a filler rod disposed in the center of the cavity; a plurality of pairs of twisted wires, wherein the pairs of twisted wires surround the outer side of the filling rod; the ribbon is arranged between the sheath layer and the cable core, and the ribbon separates a gap between the cable core and the sheath layer.

In the technical scheme, the ribbon is arranged between the sheath layer and the cable core, and the gap is separated between the cable core and the sheath layer, so that the contact between the cable core and the sheath layer is reduced, the dielectric influence of the sheath layer on the cable core is reduced, and the data transmission performance of the cable is improved.

Further, according to the embodiment of the application, wherein, the data cable further comprises an outer insulating layer, the outer insulating layer is arranged between the sheath layer and the cable tie, and the outer insulating layer is arranged outside the cable core.

Further, according to the embodiment of the application, the outer insulation layer is made of a PET film strip.

Further, according to the embodiment of the application, the sheath layer is made of polyethylene material.

Further, according to this application embodiment, wherein, the twisted pair line includes: the two conductors are twisted with each other; and the inner insulating layer is wrapped outside the conductor through extrusion molding.

Further, according to the embodiment of the present application, the number of the twisted pairs is 25 pairs.

Further, according to the embodiment of the application, 5 pairs of twisted pairs surround two layers at the periphery of the filling rod, the inner layer is provided with ten pairs of twisted pairs, and the outer layer is provided with fifteen pairs of twisted pairs.

Further, according to this application embodiment, wherein, the quantity of ribbon is 4, and the ribbon evenly distributed is in the periphery of cable core.

Further, according to the embodiment of the present application, wherein the cable tie is made of an insulating material.

Further in accordance with an embodiment of the present application, wherein the cable tie is formed by twisting a filament-like high molecular polymer.

Compared with the prior art, the method has the following beneficial effects: this application separates a clearance through setting up the ribbon between restrictive coating and cable core between cable core and the restrictive coating to reduce the contact between cable core and the restrictive coating, reduce the dielectric influence of restrictive coating to the cable core, and then improve the data transmission performance of cable.

Drawings

The present application is further described below with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of an unshielded cable according to the present application.

In the attached drawings

1. Sheath layer 2, outer insulating layer 3 and cable core

301. Filler rod 302, twisted pair 303, conductor

304. Inner insulating layer 4, ribbon

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clear and fully described, embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of some embodiments of the invention and are not limiting of the invention, and that all other embodiments obtained by those of ordinary skill in the art without the exercise of inventive faculty are within the scope of the invention.

In the description of the present invention, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "a," "an," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

For the purposes of simplicity and explanation, the principles of the embodiments are described by referring mainly to examples. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments. It will be apparent, however, to one skilled in the art that the embodiments may be practiced without these specific details. In some instances, well-known methods and structures have not been described in detail so as not to unnecessarily obscure the embodiments. In addition, all embodiments may be used in combination with each other.

Fig. 1 shows a specific structure of a non-shielded cable in an embodiment, and as shown in fig. 1, the non-shielded cable in this embodiment includes a sheath layer 1, an insulating layer 2, and a cable core 3. Between the insulating layer 2 and the sheath layer 1, a ribbon 4 is provided. Specifically, the quantity of ribbon 4 has four, forms by insulating filiform high molecular polymer twisting with fingers, distributes around insulating layer 2, separates annular clearance one between insulating layer 2 and restrictive coating 1 to reduce the contact between cable core 3 and the restrictive coating 1, reduce the dielectric influence of restrictive coating 1 to cable core 3, and then improve the data transmission performance of cable.

The sheath layer 1 is cylindrical, a hollow cavity is formed inside the sheath layer, and the cable core 3 is arranged in the cavity. The sheath layer 1 is made of an insulating solid polyethylene material, the polyethylene is odorless and nontoxic, has excellent low-temperature resistance (the lowest use temperature can reach-70 to-100 ℃), has good chemical stability, can resist corrosion of most of acid and alkali, is insoluble in common solvents at normal temperature, has small water absorption and excellent electrical insulation performance, and the characteristics ensure that the polyethylene can effectively resist the external harsh environment when being used as an outer sheath material.

Outer insulating layer 2 sets up between restrictive coating 1 and cable core 3, and outer insulating layer 2 wraps up in the 3 outsides of cable core through the extrusion molding. The outer insulating layer 2 is formed by coating a PET film belt, so that the cable core 3 can keep compact and round transition state in the cable manufacturing process. In addition, the outer insulating layer 2 has good performances of water resistance, moisture resistance, corrosion resistance, oxidation resistance and the like, and the service life of the cable can be greatly prolonged. Meanwhile, the PET material adopted by the outer insulating layer 2 has excellent mechanical property, the toughness is the best of all thermoplastic plastics, and the tensile strength and the impact strength are much higher than those of common films.

The cable core 3 includes twisted pairs and a filler rod 301. In this embodiment, the filler rod 301 is disposed at the center of the cable core, two layers of twisted pairs 301 surround the outer side of the filler rod 301, the inner layer has ten twisted pairs, and the outer layer has fifteen twisted pairs. The twisted pairs are embodied as 25 pairs, each twisted pair 302. Specifically, the twisted pair 302 includes two conductors 303 wound around each other and an inner insulating layer 304 wrapped around the outer sides of the conductors 303. The conductor 303 is formed by a copper rod with the diameter of 2.6mm, the copper rod with the diameter of 2.6mm is changed into a softened conductor 303 meeting the process requirements through the processes of wire drawing, annealing and preheating of a series machine, and after the conductor 303 is preheated, an inner insulating layer 304 is extruded on the conductor 303 through an extruder head of the series machine, so that the single-wire process is completed. When the conductor 303 extrudes the inner insulating layer 304, master batches with different colors are added into the extruder to produce copper single wires with different colors, and the total color is 30, so that the identification and production of subsequent processes are facilitated.

The 25 twisted pairs 302, which are composed of 30 conductors 303 of different colors, are matched in pairs according to the process specification, and twisted pairs 302 with different pitches are produced on a pair winch. The inner layer ten pairs 302 are divided into two groups, one group is five pairs 302, and five pitches are designed according to the capability of the equipment and the requirement of the process. The outer fifteen pairs of the twisted lines 302 are divided into three groups, one group of five pairs of twisted lines 302, and five pitches different from those of the inner layer are designed according to the capability of the equipment and the requirements of the process. Thus, the utility model cable has 25 pairs of twisted pairs 302 with ten pitches of different sizes.

In the present embodiment, the filler rod 301 may be made of a silicon carbide composite material, an aluminum-plastic composite material, a metal material, or the like, and the present application is not limited thereto. The filler rod 301 is circular in cross-section. Ten pairs of twisted wires 302 are arranged around the outer circumference of the filler rod 301 by a cabling machine to cover the entire circumference of the filler rod 301. The outer fifteen twisted pairs 302 overlay the inner ten twisted pairs 302.

Although the illustrative embodiments of the present application have been described above to enable those skilled in the art to understand the present application, the present application is not limited to the scope of the embodiments, and various modifications within the spirit and scope of the present application defined and determined by the appended claims will be apparent to those skilled in the art from this disclosure.

Claims (10)

1. An unshielded cable, comprising:

the sheath layer is cylindrical, and a hollow cavity is formed in the sheath layer;

the cable core, the cable core sets up in the cavity, the cable core includes:

a filler rod disposed in the center of the cavity;

the paired wires surround the outer side of the filling rod;

the cable comprises a cable body, a cable jacket layer, a cable cover, a cable tie, a cable cover and a cable cover, wherein the cable jacket layer is arranged between the cable core and the cable cover, and the cable core is separated from the cable cover by the cable tie.

2. A non-shielded electrical cable according to claim 1, further comprising an outer insulating layer disposed between the jacket layer and the cable ties, the outer insulating layer being outside the cable core.

3. An unshielded cable according to claim 2, wherein said outer insulating layer is made of a PET film tape.

4. A non-shielded electrical cable according to claim 1, wherein the sheath layer is made of polyethylene material.

5. An unshielded cable according to claim 1, wherein said twisted pairs comprise:

two conductors, the two conductors being twisted with each other;

the inner insulating layer is wrapped on the outer side of the conductor through extrusion molding.

6. An unshielded cable according to claim 1, wherein said number of twisted pairs is 25 pairs.

7. An unshielded cable according to claim 6, wherein 25 pairs of said twisted pairs are wrapped around said filler rod in two layers, an inner layer having ten pairs and an outer layer having fifteen pairs.

8. A non-shielded cable according to claim 1, wherein the number of said twist ties is 4, said twist ties being evenly distributed around the circumference of said core.

9. A non-shielded electrical cable according to claim 1, wherein the cable tie is made of an insulating material.

10. A non-shielded electrical cable according to claim 1, wherein the twist ties are formed by twisting a filamentary polymer.

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