WO2014101351A1

WO2014101351A1 - Self-supporting coaxial cable

Info

Publication number: WO2014101351A1
Application number: PCT/CN2013/072419
Authority: WO
Inventors: 黄冬莲
Original assignee: 深圳市联嘉祥科技股份有限公司
Priority date: 2012-12-31
Filing date: 2013-03-11
Publication date: 2014-07-03
Also published as: CN103915149A

Abstract

A self-supporting coaxial cable comprises a conductor (1), an adhesive layer (2), an insulation layer (3), a shielding layer and an outer sheath (6). The adhesive layer combines the conductor and the insulation layer into a whole. The shielding layer is a composite shielding layer. Components of the coaxial cable form a whole, are integrally stressed during overhead or suspended laying, and can support self weight. Therefore, in an overhead or suspended condition, the cable can be used normally without fracture due to the self weight.

Description

Self-supporting coaxial cable

Technical field

The present invention relates to cable construction, and more particularly to a self-supporting coaxial cable.

Background technique

The coaxial cable is divided into four layers from the inside to the outside: a central copper wire (single-stranded solid wire or multiple stranded wires), a plastic insulator, a mesh-shaped conductive layer and a wire sheath. The central copper wire and the mesh conductive layer form a current loop. Because the center copper wire and the mesh conductive layer are coaxial, this type of cable is named a coaxial cable. Although the existing coaxial cable has good electrical connection performance, due to the complicated structure and heavy weight, it may break due to the inability to bear its own weight when it is laid overhead or suspended.

Summary of the invention

The technical problem to be solved by the present invention is to provide a self-supporting coaxial cable for the defects that the prior art coaxial cable cannot withstand its own weight and the like.

The technical solution adopted by the present invention to solve the technical problem thereof is to provide a self-supporting coaxial cable, comprising a conductor, an adhesive layer, an insulating layer, a shielding layer and an outer sheath; the adhesive layer is a conductor and an insulating layer The combination is a whole; the shielding layer is a composite shielding layer.

Preferably, the conductor is a plurality of strands of finely stranded ultra-thin bare copper wire.

Preferably, the outer diameter of the copper wire per share is at most 0.16 mm.

Preferably, the adhesive layer has a thickness of 0.01 mm to 0.5 mm, preferably 0.1 mm.

Preferably, the composite shielding layer comprises an aluminum foil wrap layer and a copper wire braid layer.

Preferably, the copper wire braid is coated on the periphery of the aluminum foil wrap.

Preferably, the aluminum foil has a thickness of from 20 μm to 30 μm, preferably 28 μm.

Preferably, the material of the outer sheath is polyvinyl chloride.

The self-supporting coaxial cable embodying the invention has the following advantages or beneficial effects: the various components of the coaxial cable form a whole body, and are integrally stressed when being laid overhead or suspended, can bear its own weight, and ensure that it is overhead or In the case of a dangling, the coaxial cable can still be used normally without breaking due to its own weight.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings which are used in the description of the embodiments will be briefly described. It is obvious that the drawings in the following description are only some embodiments of the present invention. One of ordinary skill in the art can also obtain other drawings based on these drawings without paying any creative effort.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic cross-sectional view of an embodiment of a self-supporting coaxial cable of the present invention.

detailed description

In order to make the objects, the technical solutions and the advantages of the present invention more comprehensible, the various embodiments of the present invention will be described with reference to the accompanying drawings. An embodiment. It is understood that other embodiments may be utilized, and structural and functional modifications may be made to the embodiments described herein without departing from the scope and spirit of the invention.

In an embodiment of the self-supporting coaxial cable provided by the present invention, as shown in FIG. 1, a conductor 1, an adhesive layer 2, an insulating layer 3, a shielding layer and an outer sheath 6 are included. Wherein, the conductor 1 is a multi-strand fine stranded ultra-thin bare copper wire material. In this embodiment, the outer diameter of the copper wire per strand may be up to 0.16 mm.

In the self-supporting coaxial cable embodiment, the adhesive layer 2 combines the conductor 1 and the insulating layer 3 as a whole, that is, the conductor 1 is coated with a characteristic material having adhesive properties, and then adhered. The periphery of the mixture layer 2 is covered with an insulating layer 3, and the conductor 1 and the insulating layer 3 (insulating PE) are combined into a complete whole by the action of an adhesive, and the thickness of the adhesive layer 2 can be 0.01 mm- 0.5 mm, this embodiment is preferably 0.1 mm.

In the self-supporting coaxial cable embodiment, the shielding layer is a composite shielding layer comprising an aluminum foil wrap layer 4 and a copper wire braid layer 5. The aluminum foil wrapping layer 4 adopts a wrapping process, and the aluminum foil is tightly coated on the insulating layer 3, thereby solving the looseness of the conventional vertical wrapping process aluminum foil. The aluminum foil may have a thickness of 20 μm to 30 μm, and is preferably 28 μm in this embodiment. Further, a copper wire braid 5 is coated on the periphery of the aluminum foil wrap layer 4.

The outer sheath is made of polyvinyl chloride (PVC) material, which is covered with PVC material outside the shielding layer. PVC material can be added with appropriate additives in PVC according to the needs of the environment to meet various environmental requirements. Demand for use.

Polyvinyl chloride, Polyvinylchloride, PVC, a thermoplastic resin obtained by polymerizing vinyl chloride under the action of an initiator. It is a homopolymer of vinyl chloride, and a vinyl chloride homopolymer and a vinyl chloride copolymer are collectively referred to as a vinyl chloride resin. PVC is a white powder with an amorphous structure and a small degree of branching. Industrial production of PVC molecular weight is generally in the range of 50,000 to 120,000, with greater polydispersity, molecular weight increases with the decrease of polymerization temperature; no fixed melting point, 80-85 ° C begins to soften, 130 ° C becomes viscoelastic state , 160 ~ 180 ° C began to transform into a viscous flow state; has good mechanical properties, tensile strength of about 60MPa, impact strength of 5 ~ 10kJ / m2; has excellent dielectric properties. However, the stability to light and heat is poor. When exposed to sunlight above 100 °C or exposed to sunlight for a long time, it will decompose to produce hydrogen chloride, and further autocatalytic decomposition, causing discoloration, and physical and mechanical properties are also rapidly declining. In practice, it is necessary to add stability. Agent to improve the stability to heat and light.

The various components of the coaxial cable are formed in one piece, and are integrally stressed when being laid overhead or suspended, and can withstand their own weight. According to the practice, the coaxial cable of the embodiment can be normally used without being broken by its own weight in the case where the overhead or the suspended height does not exceed 500 m.

The above are only the preferred embodiments of the present invention, and those skilled in the art can make various changes or equivalents to these features and embodiments without departing from the spirit and scope of the invention. In addition, these features and embodiments may be modified to adapt to the specific circumstances and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all the embodiments falling within the scope of the claims of the present invention fall within the scope of the present invention.

Claims

A self-supporting coaxial cable, comprising: a conductor (1), an adhesive layer (2), an insulating layer (3), a shielding layer and an outer sheath (6); the adhesive layer ( 2) Combining the conductor (1) and the insulating layer (3) as a whole; the shielding layer is a composite shielding layer.
The self-supporting coaxial cable according to claim 1, characterized in that the conductor (1) is a multi-strand fine stranded ultra-thin bare copper wire.
The self-supporting coaxial cable according to claim 2, wherein each of said copper wires has an outer diameter of at most 0.16 mm.
The self-supporting coaxial cable according to claim 1, characterized in that the adhesive layer (2) has a thickness of from 0.01 mm to 0.5 mm.
Self-supporting coaxial cable according to claim 4, characterized in that the adhesive layer (2) has a thickness of 0.1 mm.
The self-supporting coaxial cable according to claim 1, wherein the composite shielding layer comprises an aluminum foil wrap layer (4) and a copper wire braid layer (5).
The self-supporting coaxial cable according to claim 6, characterized in that the copper wire braid (5) is coated on the periphery of the aluminum foil wrap layer (4).
The self-supporting coaxial cable according to claim 7, wherein the aluminum foil has a thickness of from 20 μm to 30 μm.
The self-supporting coaxial cable according to claim 8, wherein the aluminum foil has a thickness of 28 μm.
The self-supporting coaxial cable according to claim 1, characterized in that the material of the outer sheath (6) is polyvinyl chloride.