CN201226263Y

CN201226263Y - Four-shielding coaxial cable

Info

Publication number: CN201226263Y
Application number: CNU2008200881540U
Authority: CN
Inventors: 徐建军
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-06-12
Filing date: 2008-06-12
Publication date: 2009-04-22
Anticipated expiration: 2018-06-12

Abstract

The utility model discloses a four-layer shielded coaxial cable, which relates to a signal transmission cable. The four-layer shielded coaxial cable comprises a radio frequency signal cable; an insulating material layer, a shielding layer and a sheath concentrically wrap a cable core orderly from the inside out to form the radio frequency signal cable; aluminum foils are wrapped by aluminum magnesium alloy wire meshes or copper wire meshes to form the shielding layer; and the four-layer shielded coaxial cable is characterized in that a reinforcing shielding layer is also concentrically arranged between the shielding layer and the sheath. The ordinary double-layer shielded coaxial cable is improved into the coaxial cable with a four-layered shielding structure (aluminum foil plus metal mesh plus aluminum foil plus metal mesh). The four-layer shielded coaxial cable, which has the advantages of simple and reasonable structure, novel design, wide application range and strong shielding property, can effectively prevent interference and not only is applicable to transmission in a bi-directional wired television system but also is used to transmit digital television signals. The four-layer shielded coaxial cable can be widely applied in fields and places such as electric power, metallurgy, petrochemistry and airports, and has a good promotion and application value and a wide market prospect.

Description

Four shielding coaxial cable

Technical field

The utility model relates to a kind of signal transmssion line, especially a kind of cable of transmitting radio frequency signal.

Background technology

Along with economy, fast development of society, Digital Television begins to enter huge numbers of families.Normally used on the market double shield (aluminium foil adds woven wire) coaxial cable has certain loss aspect transmitting digital TV signal, and its shielding properties is not high, and antijamming capability is not strong, has directly influenced the normal use of Digital Television.Simultaneously, in Qube,, must reduce the noise that confluxes for making the reverse transfer operate as normal; The noise that confluxes seals in reverse system by the space electromagnetic interference and forms, and not only influences the cable TV signal quality, and can reveal away and disturb other signals, influences the normal use of cable TV.

The utility model content

Technical problem to be solved in the utility model is to overcome above-mentioned the deficiencies in the prior art, and a kind of improvement of holding wire is provided, and it is good that this holding wire should have anti-interference, the characteristics that shielding properties is strong.

The technical solution adopted in the utility model is: Four shielding coaxial cable, comprise rf signal line, this rf signal line be the core periphery with one heart coated successively from inside to outside insulation material layer, screen and foreskin, this screen is made of aluminium foil outer wrapping almag silk screen or copper mesh, it is characterized in that being provided with one and strengthening screen also with one heart between screen and the foreskin.

Described reinforcement screen is made of aluminium foil outer wrapping almag silk screen or copper mesh.

The Four shielding coaxial cable that the utility model provides, simple and reasonable, novel in design, common double shielded coaxial cable is modified into the coaxial cable of " aluminium foil+wire netting+aluminium foil+wire netting " four layers of shielding construction, have that the scope of application is wide, shielding properties is strong, can effectively prevent to disturb, be not only applicable to the transmission in the Qube, also can be used for the transmission of digital television signal, can be widely used in places such as electric power, metallurgy, petrochemical industry, airport, have excellent popularization using value and extensive market prospects.

Description of drawings

Fig. 1 is a perspective view of the present utility model.

Among the figure: 1-core, 2-insulation material layer, 3-screen, 4-strengthen screen, 5-foreskin, 6-rf signal line.

Embodiment

As seen from the figure: Four shielding coaxial cable, included rf signal line 6 is identical with the structure of existing conventional rf signal line, be coated with one heart successively from inside to outside insulation material layer 2, screen 3 and foreskin 5 in the periphery of core (generally being copper core) 1, this screen 3 is made of aluminium foil 3-1 outer wrapping almag silk screen 3-2 or copper mesh, is provided with one and strengthens screen 4 also with one heart between screen 3 and the foreskin 5.

Described reinforcement screen 4 is made of aluminium foil 4-1 outer wrapping almag silk screen 4-2 or copper mesh.

The coaxial cable of four layers of shielding construction of the present utility model can extrusion molding together on same equipment, and production equipment needs in addition simple refit, and those skilled in the art can be competent at repacking work.

Claims

1, Four shielding coaxial cable, comprise rf signal line (6), this rf signal line (6) is with one heart coated successively from inside to outside insulation material layer (2), screen (3) and foreskin (5) in core (1) periphery, this screen (3) is made of aluminium foil (3-1) outer wrapping almag silk screen (3-2) or copper mesh, it is characterized in that the also concentric reinforcement screen (4) that is provided with between screen (3) and the foreskin (5).

2, Four shielding coaxial cable according to claim 1 is characterized in that described reinforcement screen (4) is made of aluminium foil (4-1) outer wrapping almag silk screen (4-2) or copper mesh.