CN211319777U - Shielding cable - Google Patents

Abstract

The application discloses shielding cable mainly relates to data transmission cable technical field. A shielded cable described herein includes: a sheath layer; the second shielding layer is arranged in the cavity, and the first shielding layer is a braided shielding net; a plurality of twisted pairs, the twisted pairs of the plurality of sets being wrapped by the first shielding layer, the twisted pairs being disposed within the cavity, the twisted pairs including: and the second shielding layer is arranged on the outer side of the twisted pair and is a metal foil shielding tape. This application constitutes shielding system jointly through setting up first shielding layer and second shielding layer: the first shield is a woven shielding net which is arranged between the sheath layer and the twisted pair and can shield electromagnetic interference between the inside and the outside of the cable; the second shielding layer is a metal foil shielding belt and is arranged on the outer side of each pair of twisted-pair wires, so that electromagnetic interference between the twisted-pair wires in the cable can be shielded, an omnibearing shielding effect is achieved, and the speed and the quality of data transmission are improved.

Description

Shielding cable

Technical Field

The application relates to the technical field of data transmission cables, in particular to a shielding cable.

Background

Data transmission cables are typically made using sets of twisted wire pairs. The twisted pair comprises two mutually insulated and intertwined leads, is a universal wiring, and belongs to an information communication network transmission medium. The twisted pair is divided into a shielded cable (STP) and an unshielded cable (UTP), and a metal shielding layer is arranged between the twisted pair and the outer insulating sheath of the shielded cable. The shielding layer can reduce radiation, prevent information from being intercepted, and also can prevent external electromagnetic interference from entering, so that the shielded twisted pair has higher transmission rate than the similar unshielded twisted pair.

However, when the cable is actually used, there is also mutual interference between twisted pairs arranged at the center of the cable. The shielding layer can solve the interference between adjacent cables to a certain extent, but cannot eliminate the interference between twisted pairs in the cable itself. In the prior art, a cross-shaped framework is generally arranged at the center of a cable to separate twisted pairs, so that the problem of interference among the twisted pairs is solved to a certain extent. However, as the requirements for the speed and efficiency of data transmission are gradually increased, the cross frame cannot effectively isolate interference, and a new technical solution needs to be provided to solve the interference problem between twisted pairs in the cable.

SUMMERY OF THE UTILITY MODEL

The purpose of this application is to provide a shielding cable, solves the interference problem among the inside twisted pair of cable among the prior art.

In order to achieve the above purpose, the embodiments of the present application adopt the following technical solutions: a shielded cable, comprising: the sheath layer is cylindrical, and a hollow cavity is formed inside the sheath layer; the sheath layer is cylindrical, and a hollow cavity is formed inside the sheath layer; the first shielding layer is arranged in the cavity and is a braided shielding net which is formed by weaving a plurality of metal wires; the twisted pair of multiunit, the twisted pair of multiunit is wrapped up by first shielding layer, and the twisted pair of multiunit twines each other into the cable, and the twisted pair sets up in the cavity, and the twisted pair includes: the second shielding layer is arranged on the outer side of the twisted pair, the second shielding layer is a metal foil shielding tape, the metal foil shielding tape is wound or coated on the outer side of the twisted pair, the metal foil shielding tape is overlapped at the wound or coated overlapping position, the overlapping rate of the overlapping position is more than or equal to 25%, and the thickness of the metal foil shielding tape is 0.05-0.1 mm.

In the above technical solution, the first shielding layer and the second shielding layer are arranged to jointly form a shielding system for shielding a cable: the first shield is a woven shielding net which is arranged between the sheath layer and the twisted pair and can shield electromagnetic interference between the inside and the outside of the cable; the second shielding layer is a metal foil shielding belt and is arranged on the outer side of each pair of twisted-pair wires, so that electromagnetic interference between the twisted-pair wires in the cable can be shielded, an omnibearing shielding effect is achieved, and the speed and the quality of data transmission are improved.

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

Further, according to the embodiment of the present application, wherein the metal wire is a tin-plated copper wire.

Further, according to an embodiment of the present application, the twisted pair further includes: the two wires are mutually wound and are copper wires; the insulating layer is arranged on the outer side of the lead and is made of a PVC material; the number of the twisted pairs is four, the four pairs of twisted pairs are adjacent to each other pairwise, the four pairs of twisted pairs are mutually wound and twisted into a cable, and the twisted pairs are tangent to the first shielding layer.

Further, according to the embodiment of the present application, the second shielding layer is made of an aluminum foil, and a layer of insulating material is compounded on the outer side of the aluminum foil.

Further, according to the embodiment of the present application, wherein the insulating material is a PFT material.

Further, according to the embodiment of the present application, wherein the center of the shielding cable is provided with a filler.

Further, according to the embodiment of the present application, wherein the filler is cotton thread.

Further, according to the embodiment of the application, a tearing rope is arranged between the sheath layer and the second shielding layer, and the tearing rope is made of aramid yarns or glass fiber yarns.

Compared with the prior art, the method has the following beneficial effects: this application constitutes the shielding system of shielding cable jointly through setting up first shielding layer and second shielding layer: the first shield is a woven shielding net which is arranged between the sheath layer and the twisted pair and can shield electromagnetic interference between the inside and the outside of the cable; the second shielding layer is a metal foil shielding belt and is arranged on the outer side of each pair of twisted-pair wires, so that electromagnetic interference between the twisted-pair wires in the cable can be shielded, an omnibearing shielding effect is achieved, and the speed and the quality of data transmission are improved.

Drawings

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

Fig. 1 is a schematic structural diagram of a shielded cable in the present application.

Fig. 2 is a schematic diagram of the structure of the twisted pair of fig. 1.

In the attached drawings

1. Sheath layer 2, first shielding layer 3, twisted pair

31. Second shield layer 32, conductive line 33, and insulating layer

4. Filler 5, tear cord

Detailed Description

In order to make the objects and technical solutions of the present invention clear and fully described, and the advantages thereof more clearly understood, the embodiments of the present invention are described in further detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of some, but not all, embodiments of the present invention and are not to be considered as limiting, and that all other embodiments can be made by one of ordinary skill in the art without any inventive work.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, 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 is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 meaning 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.

The present embodiment shows a specific structure of a shielded cable by fig. 1. As shown in fig. 1, a shielded cable according to the present application includes a sheath layer 1, a first shield layer 2, and a twisted pair 3. The sheath layer 1 is cylindrical, a hollow cavity is formed inside the sheath layer, and the twisted pair 3 is arranged in the cavity. The sheath layer 1 is made of insulating PVC materials and mainly plays a role in protection.

In the above technical solution, the first shielding layer 2 is wrapped outside the twisted pair 3. The first shielding layer 2 is embodied as a braided shielding layer in the present embodiment, and is braided by using a plurality of metal wires, wherein the braided wires are specifically tinned copper wires. The first shielding layer 2 can provide a shielding function, and can further enhance the tensile strength of the cable, and eliminate the influence of external stress on the cable.

In the above technical solution, there are 4 pairs of twisted pairs 3, each pair of twisted pairs 3 is formed by winding two wires 32 around each other, and the outer sides of the wires 32 are wrapped with an insulating layer 33. The insulating layer 33 is made of PVC material, so that the effect of data transmission influenced by mutual conduction between the conductors 32 is prevented, and meanwhile, the effect of protecting the conductors 32 is achieved; the conductor 32 is made of 99.95% oxygen-free copper and has high conductivity.

Furthermore, a second shielding layer 31 is disposed on the outer side of each twisted pair 3, and the second shielding layer 31 is made of metal foil, preferably aluminum foil, and a layer of insulating material, preferably PET, is compounded on the outer side of the metal foil. The metal foil is wound or coated on the outer side of the twisted pair 3, and is overlapped at the overlapping part of the winding or coating to ensure the shielding effect, specifically, the overlapping rate is greater than or equal to 25% in the embodiment.

In the present application, the first shielding layer 2 and the second shielding layer 31 together constitute a shielding system for shielding the cable. The first shielding layer 2 is a braided shielding net, is arranged between the sheath layer 1 and the twisted pair 3 and can shield electromagnetic interference between the inside and the outside of the cable; the second shielding layer is a metal foil shielding tape and is arranged on the outer side of each pair of twisted-pair wires 3, so that electromagnetic interference between the twisted-pair wires in the cable can be shielded, an omnibearing shielding effect is achieved, and the speed and the quality of data transmission are improved.

In a shielded cable according to the present application, a filler 4 is arranged in the center of the cable, and the filler 4 is embodied as a plurality of cotton threads. This filler 4's setting helps the cable whole to keep regular cylindricality, and when the wiring, the area of contact minimum between cable and the cable can be guaranteed to columniform shape, helps preventing to appear the crosstalk phenomenon between the cable. In addition, the filler can further enhance the tensile strength of the cable.

In a shielded cable according to the present application, a tear string 5 is disposed between the sheath layer 1 and the first shielding layer 2. The tearing rope 5 is specifically made of aramid yarn or glass fiber yarn. The tearing rope 5 is arranged to play a role in resisting pulling and assist in stripping wires, namely, after the jacket layer 1 is cut off a small opening during wiring, the jacket layer 1 can be stripped through the tearing rope 5. In addition, the tearing rope 5 is made of fireproof flame-retardant materials and can absorb heat emitted by the cable in the using process.

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. A shielded cable, comprising:

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

the first shielding layer is arranged in the cavity, the first shielding layer is a braided shielding net, and the braided shielding net is formed by weaving a plurality of strands of metal wires;

a plurality of sets of twisted pairs, said twisted pairs of said plurality of sets being wrapped by said first shielding layer, said twisted pairs of said plurality of sets being twisted about one another into a cable, said twisted pairs being disposed within said cavity, said twisted pairs comprising:

the second shielding layer is arranged on the outer side of the twisted pair, the second shielding layer is a metal foil shielding tape, the metal foil shielding tape is wound or coated on the outer side of the twisted pair, the metal foil shielding tape is overlapped at a wound or coated overlapping part, the overlapping rate of the overlapping part is more than or equal to 25%, and the thickness of the metal foil shielding tape is 0.05-0.1 mm.

2. The shielded cable of claim 1, wherein the twisted pair further comprises:

the two conducting wires are mutually wound and are copper conducting wires;

the insulating layer is arranged on the outer side of the lead and is made of a PVC material;

the number of the twisted pairs is four, the four pairs are adjacent to each other in pairs, the four pairs are twisted and stranded with each other to form a cable, and the twisted pairs are tangent to the first shielding layer.

3. A shielded cable according to claim 1, wherein said sheath layer is made of PVC material.

4. The shielded cable of claim 1, wherein said wire is tinned copper wire.

5. The shielded cable of claim 1, wherein the second shielding layer is made of aluminum foil, and a layer of insulating material is laminated on the outside of the aluminum foil.

6. A shielded cable according to claim 5, wherein said insulating material is PFT material.

7. A shielded cable according to claim 1, wherein the shielded cable is centrally provided with a filler.

8. A shielded cable according to claim 7, wherein said filler is cotton.

9. A shielded cable according to claim 1, wherein a ripcord is provided between the sheath layer and the second shielding layer.

10. A shielded cable according to claim 9, wherein said ripcords are of aramid yarn or glass fiber yarn.

Images