CN201315188Y - A New Type of Shielded Coaxial Cable - Google Patents

Abstract

The utility model discloses a novel shielding coaxial-cable, aiming at providing a novel shielding coaxial-cable which has simple structure and good shielding performance and can extend signal transmission distance and acquire good transmission effect. The novel shielding coaxial-cable comprises an inner conductor (1), a foam insulating layer (2), a plastic-aluminum composite membrane belt (3), a metal wire weaving layer (4) and an outer jacket (8) that are arranged from inside to outside along radial direction. The new shielding coaxial-cable also comprises an inner lining layer (5) and a shielding layer that are arranged in sequence between the metal wire weaving layer (4) and the outer jacket (8) from inside to outside along the radial direction. The novel shielding coaxial-cable can be widely used in the field of network communication.

Description

A New Type of Shielded Coaxial Cable

technical field

The utility model relates to a novel shielded coaxial cable.

Background technique

In today's network transmission, the outer surface of the cable has been attacked by various electromagnetic waves. At different times and in different directions, it is difficult to predict the strength of the electromagnetic wave frequency. When the existing cables are used for information transmission, electromagnetic waves that leak through the network often invade the cables and affect normal signal transmission. In the existing technology, the manufacturing principle of ordinary braided coaxial cables is usually: extrude a layer of foam insulation layer outside the inner conductor, and then coat a layer of aluminum-plastic composite on the outer surface of the foam insulation layer. Next, a layer of woven wire mesh is simply coated on the aluminum-plastic composite film belt as the outer conductor, and finally a layer of PVC sheath is extruded on the surface of the outer conductor to complete the manufacture of the entire structure. . However, in the current existing products, the outer conductor acts as a high-frequency transfer circuit and shields external electrical signals. Therefore, according to the three basic principles of shielding, such a structure shields external electrical signals. Poor performance, prone to interference, affecting normal signal transmission. Here it is, existing deficiency in prior art.

Utility model content

The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a new type of shielded coaxial cable with simple structure, excellent shielding performance, extended signal transmission distance and excellent transmission effect.

The technical scheme adopted by the utility model is: the utility model includes an inner conductor, a foamed insulating layer, an aluminum-plastic composite film belt, a wire braided layer, an outer sheath, the inner conductor, the foamed insulating layer, the The aluminum-plastic composite film strip, the wire braiding layer and the outer sheath are arranged radially from inside to outside in turn, and the new shielded coaxial cable also includes an inner lining layer and a shielding layer, and the inner lining layer The shielding layer and the shielding layer are sequentially disposed between the wire braiding layer and the outer sheath from inside to outside in the radial direction.

The shielding layer further includes an aluminum-plastic composite film tape and a conductive alloy material.

The conductive alloy material is tinned steel wire, and the aluminum-plastic composite film tape is a double-sided aluminum-plastic composite film tape.

The beneficial effects of the utility model are: since the metal wire braiding layer and the outer sheath in the utility model are further provided with the inner lining layer and the shielding layer along the radial direction from the inside to the outside, the The shielding layer includes an aluminum-plastic composite film strip and a conductive alloy material, and the conductive alloy material is braided with tinned steel wire, so the conductive alloy material in the shielding layer can generate eddy currents during the shielding process, increasing the shielding effect; because the wave impedance of the inner lining layer and the shielding layer is very different, so the reflection phenomenon to the external electromagnetic wave is increased, that is, the electromagnetic shielding effect of this structure is good; due to the excellent electrical conductivity of aluminum and the strong Due to the characteristics of magnetic materials, the shielding layer adopts this structure, which can greatly strengthen the shielding effect on static electricity and static magnetism. To sum up, the utility model proceeds from the three basic principles of shielding, strengthens the shielding performance of the entire cable as a whole, and prolongs the transmission distance of electrical signals.

Description of drawings

Fig. 1 is a structural representation of the utility model.

Detailed ways

Specific embodiment one:

As shown in Figure 1, the utility model includes an inner conductor 1, a foamed insulating layer 2, an aluminum-plastic composite film strip 3, a wire braid 4, an outer sheath 8, the inner conductor 1, the foamed insulating layer 2. The aluminum-plastic composite film belt 3 , the wire braided layer 4 and the outer sheath 8 are sequentially arranged radially from inside to outside. The aluminum-plastic composite film strip 3 and the wire braided layer 4 are combined to form an outer conductor of a high-frequency signal transmission circuit. The new shielded coaxial cable also includes an inner liner 5 and a shielding layer, and the inner liner 5 and the shielding layer are sequentially arranged on the wire braid 4 and the outer sheath 8 from inside to outside in the radial direction. between. The inner lining layer 5 can be wrapped with plastic tape or extruded plastic, and its thickness should not be less than 0.3mm. The function of the inner lining layer 5 is to achieve insulation effect between the wire braiding layer 4 and the shielding layer, and cut off the connection between the outer conductor of the high-frequency signal transmission circuit and the shielding layer. Since the shielding layer and the outer conductor are separated and independent, the utility model can directly ground the shielding layer during use to improve the shielding ability to external electromagnetic waves, that is, to improve the shielding attenuation performance of the cable, so that the shielding effect is better. go up a floor

The shielding layer further includes an aluminum-plastic composite film tape 6 and a conductive alloy material 7 . The aluminum-plastic composite film strip 6 is wrapped longitudinally or wrapped around the outer surface of the inner lining layer 5 with a double-sided aluminum-plastic composite film strip. The thickness of the aluminum-plastic composite film strip 6 is ≥0.03 mm. The overlapping ratio of the plastic composite film strip 6 longitudinally or wrapping is not less than 30%. The conductive alloy material 7 is tinned steel wire, the conductive alloy material 7 is arranged on the outer surface of the aluminum-plastic composite film belt 6, and the weaving density should not be less than 60%.

The outer sheath 8 can be made of extruded polyvinyl chloride or polyethylene sheath, and can also be made of other materials according to user needs.

The utility model can be widely used in the field of network communication.

Without departing from the inventive idea of the utility model, all equivalent changes made by using the specification and drawings of the utility model are all included in the protection scope of the claims of the utility model.

Claims (3)

1, a kind of novel screened coaxial cable, comprise inner wire (1), foaming insulation layer (2), aluminum-plastic composite membrane band (3), wire braid (4), oversheath (8), described inner wire (1), described foaming insulation layer (2), described aluminum-plastic composite membrane band (3), described wire braid (4) and described oversheath (8) radially are provided with successively from inside to outside, it is characterized in that: described novel screened coaxial cable also comprises inner covering (5) and screen, and described inner covering (5) and screen radially are arranged between described wire braid (4) and the described oversheath (8) successively from inside to outside.

2, a kind of novel screened coaxial cable according to claim 1 is characterized in that: described screen comprises aluminum-plastic composite membrane band (6) and electrical conductivity alloy material (7) again.

3, a kind of novel screened coaxial cable according to claim 2, it is characterized in that: described electrical conductivity alloy material (7) is a tin plated steel wire, and described aluminum-plastic composite membrane band (6) is two-sided aluminum-plastic composite membrane band.

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