Novel insulation co-extrusion double-coaxial high-speed data transmission cable

Abstract

The utility model relates to the technical field of signal transmission cables, and discloses a novel insulation co-extrusion double-coaxial high-speed data transmission cable, which comprises conductors, an insulation layer, a shielding layer and a sheath layer, and is characterized in that the two conductors are parallel to each other and are arranged at an interval; the insulating layer is uniformly and tightly wrapped on the outer sides of the two conductors, is a polytetrafluoroethylene insulating layer, and is simultaneously extruded at one time, so that the insulating layer is pushed and wrapped on the outer sides of the two conductors; the shielding layer comprises a first shielding layer and a second shielding layer, the first shielding layer wraps the outer ring of the insulating layer, and the second shielding layer wraps the outer ring of the first shielding layer; the sheath layer wraps the outer ring of the second shielding layer and is used for fixing and shielding protection. The two conductors are stranded bare copper, tinned copper wires or silver-plated copper wires. The cable has more reliable mechanical and physical stability, is more beneficial to coupling of an electromagnetic field, can reduce capacitance impedance, has lower time delay difference, and improves signal transmission speed and quality.

Description

Technical Field

[0001] The utility model relates to the technical field of signal transmission cables, in particular to a novel insulated co-extruded dual coaxial high-speed data transmission cable. Background Art

[0002] With the development of information technology and data technology, the demand for high-speed data cables for connecting a large number of systems and massive data is increasing. At present, my country's flat high-speed cable industry has developed to a considerable scale, but it is still unable to fully match the rapidly developing equipment iteration requirements due to the limitation of technology updates.

[0003] Insulation co-extrusion technology is a technology that uses a cold extrusion process to form insulation materials on two parallel conductors at one time. This technology can effectively simplify the production process and improve production efficiency while ensuring the uniformity and consistency of the insulation layer. In the field of data transmission lines, the application of insulation co-extrusion technology can significantly improve the performance and quality of data transmission lines. In addition, the dual coaxial structure transmission line can effectively reduce electromagnetic interference and improve the transmission quality of signals by setting a shielding layer outside the conductor. This structure has significant advantages in the field of high-speed data transmission.

[0004] The structure of the high-speed cable transmission line in the prior art mainly includes two parallel conductors, an insulating layer, a shielding layer wrapped with insulation, and a sheath. The conductor core is used for signal transmission, and the shielding layer has the function of shielding external electromagnetic interference. However, since the insulating layer is extruded separately between the two conductors and is non-integratedly arranged on the outer rings of the two conductors, it is not conducive to the coupling of the magnetic field of the core, and the signal mode conversion occurs during the transmission process. The high-speed lines with insulation extruded separately are difficult to match each other longitudinally, and the capacitance impedance distribution is uneven, resulting in time delay difference and reflection, which has a great impact on the integrity and transmission of the signal. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, the purpose of the utility model is to provide a new insulated co-extruded dual-coaxial high-speed data transmission cable that is different from the existing structure, which has more reliable mechanical and physical stability, is more conducive to the coupling of electromagnetic fields, can reduce capacitive impedance, has lower delay difference, and improves signal transmission speed and quality.

[0006] The utility model is implemented by the following technical scheme: a novel insulated co-extruded dual-coaxial high-speed data transmission cable, comprising a conductor, an insulating layer, a shielding layer and a sheath layer, wherein the two conductors are parallel to each other and arranged at intervals; the insulating layer is uniformly and tightly wrapped on the outside of the two conductors, and the insulating layer is a polytetrafluoroethylene insulating layer, which is extruded at the same time so that it is pushed and wrapped on the outside of the two conductors; the shielding layer comprises a first shielding layer and a second shielding layer, wherein the first shielding layer is wrapped around the outer ring of the insulating layer, and the second shielding layer is wrapped around the outer ring of the first shielding layer; the sheath layer is wrapped around the outer ring of the second shielding layer for fixing and shielding protection.

[0007] Furthermore, the insulating layer is a solid insulating layer.

[0008] Furthermore, the two conductors are solid or stranded bare copper, tinned copper wire or silver-plated copper wire.

[0009] Furthermore, the conductor is one of stranded bare copper, tinned copper wire, silver-plated copper wire, bare copper conductor, silver-plated copper clad steel conductor, and silver-plated copper clad aluminum.

[0010] Furthermore, the first shielding layer is one of pure copper foil, aluminum composite film longitudinal package, aluminum composite film wrapping, copper composite film longitudinal package or copper composite film wrapping, and is used to shield the transmission line signal.

[0011] Furthermore, the second shielding layer is wrapped with an aluminum composite tape for reinforcement, protection and anti-interference.

[0012] Furthermore, the sheath layer is one of a wrapped hot-melt PET tape, a polyethylene sheath, a polytetrafluoroethylene sheath, a polyperfluoroethylene-propylene sheath, and a polyolefin sheath.

[0013] Compared with the prior art, the beneficial effect of the utility model is that: the utility model is a new type of insulated co-extruded dual-coaxial high-speed data transmission cable, and its two conductors are arranged parallel to each other and spaced apart, and their mechanical and physical properties such as outer diameter, density, and length are consistent. The insulation layer is integrally wrapped around the outside of the two conductors, and is extruded, pushed and wrapped around the outside of the two conductors at one time, which has more reliable mechanical and physical stability, has lower delay difference when transmitting signals, is more conducive to the coupling of electromagnetic fields, is not prone to changes in relative displacement, thereby ensuring impedance consistency, and is also conducive to the next step of processing and production. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 This is a schematic diagram of the AA-direction cross-sectional structure when the utility model is a solid flat-top type insulation layer;

[0016] Figure 3 This is a schematic diagram of the AA-direction cross-sectional structure when the utility model is a solid elliptical insulating layer;

[0017] Figure 4 This is a schematic diagram of the AA-direction cross-sectional structure when the utility model is a vertical hole flat-top type insulation layer;

[0018] Figure 5 This is a schematic diagram of the AA-direction cross-sectional structure of the utility model when the utility model has a longitudinal hole elliptical insulation layer

[0019] In the figure: 1. conductor; 2. insulation layer; 3. first shielding layer; 4. second shielding layer; 5. sheath layer. DETAILED DESCRIPTION

[0020] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0021] The utility model aims to provide a novel insulated co-extruded dual coaxial high-speed data transmission cable in view of the defects of the prior art.

[0022] Embodiment 1

[0023] This embodiment provides a new insulated co-extruded dual coaxial high-speed data transmission cable. Figure 1-Figure 5 As shown, it includes a conductor 1, an insulating layer 2, a shielding layer and a sheath layer 5. The two conductors 1 are parallel to each other and arranged at intervals. The two conductors 1 are extruded at the same time (co-extruded). Their outer diameter, density, length and other mechanical and physical properties are consistent, so that the capacitance between the two conductors is consistent, and there is a better delay difference when transmitting signals. The two conductors 1 are solid or stranded bare copper, tinned copper wire, silver-plated copper wire, bare copper conductor, silver-plated copper clad steel conductor, and silver-plated copper clad aluminum. The insulating layer 2 is evenly and tightly wrapped on the outside of the two conductors 1. In this embodiment, the insulating layer 2 is a solid core and / or low-density insulating layer, which is formed on the two parallel conductors 1 at one time by a cold pressing and extrusion process. Specifically, the insulating layer 2 can be an ordinary solid polytetrafluoroethylene insulating layer, which has a higher density of 1.9 to 2.3 kg / m 3 The data transmission cable with solid insulation layer has more reliable mechanical and physical stability, which is conducive to the subsequent cable processing and manufacturing, and improves the yield and technical indicators; the insulation layer 2 can also be a low-density polytetrafluoroethylene insulation layer with a density of 1.40-1.9 kg / m 3, the transmission line with low-density insulation has lower attenuation characteristics, and low attenuation can achieve a longer transmission distance; the insulation layer 2 can also be a vertical hole type, and the vertical hole insulation has the characteristics of low dielectric constant and low loss. The insulation layer 2 can have three types: solid core type, low-density type, and vertical hole type, and these three types of insulation can be made into flat-top type and elliptical type according to actual needs, so a total of six insulation structures are included. The insulation layer 2 is extruded at one time and pushed and wrapped on the outside of the two conductors 1, that is, the insulation layer 2 is integrated and wrapped on the outside of the two conductors 1, so that the dielectric insulation layer 2 between the two conductors 1 is thin and uniform, has lower dielectric loss, and is more conducive to the coupling of electromagnetic fields.

[0024] Reference Figure 1-Figure 5 As shown, the shielding layer includes a first shielding layer 3 and a second shielding layer 4, the first shielding layer 3 is wrapped around the outer ring of the insulating layer 2, and the second shielding layer 4 is wrapped around the outer ring of the first shielding layer 3; the first shielding layer 3 is pure copper foil, aluminum composite film longitudinally wrapped, aluminum composite film wrapped, copper composite film longitudinally wrapped or copper composite film wrapped, which is used to shield the transmission line signal. The second shielding layer 4 is wrapped with an aluminum composite tape, and the sheath layer 5 is wrapped with a hot-melt PET tape, a polyethylene sheath, a polytetrafluoroethylene sheath, a polytetrafluoroethylene sheath, a polyolefin sheath or other sheaths, which are used for reinforcement, protection and anti-interference. The sheath layer 5 is wrapped around the outer ring of the second shielding layer 4, which plays a protective role for the entire transmission line, can resist physical damage and erosion by environmental factors, and prolong the service life of the transmission line. The insulating layer 2, the shielding layer and the sheath layer 5 can be a flat structure or an elliptical structure.

[0025] The utility model discloses a novel insulated co-extruded dual-coaxial high-speed data transmission cable, wherein two conductors 1 are parallel to each other and spaced apart, and their outer diameter, density, length and other mechanical and physical properties are consistent; an insulating layer 2 is integrally wrapped around the outside of the two conductors 1, and is simultaneously extruded, pushed and wrapped around the outside of the two conductors 1 at one time, so that the physical properties of the two conductors 2 are consistent, the positions of the two conductors 2 are relatively stable, and the mechanical and physical stability is more reliable; a lower delay difference is achieved when transmitting signals, and the coupling of electromagnetic fields is more favorable; relative displacement is not likely to change, thereby ensuring impedance consistency; the cable is also favorable for the next step of processing and production, and has a higher yield rate and higher technical indicators.

[0026] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A new type of insulated co-extruded dual coaxial high-speed data transmission cable, characterized by: The invention comprises a conductor (1), an insulating layer (2), a shielding layer and a sheath layer (5), wherein the two conductors (1) are parallel to each other and arranged at intervals; the insulating layer (2) is evenly and tightly wrapped around the outer sides of the two conductors (1); the insulating layer (2) is a polytetrafluoroethylene insulating layer which is extruded at the same time so as to be pushed and wrapped around the outer sides of the two conductors (1); the shielding layer comprises a first shielding layer (3) and a second shielding layer (4), wherein the first shielding layer (3) is wrapped around the outer ring of the insulating layer (2), and the second shielding layer (4) is wrapped around the outer ring of the first shielding layer (3); the sheath layer (5) is wrapped around the outer ring of the second shielding layer (4) for fixing and shielding protection.

2. The novel insulated co-extruded dual coaxial high-speed data transmission cable according to claim 1 is characterized by: The insulating layer (2) is a solid insulating layer.

3. The novel insulated co-extruded dual coaxial high-speed data transmission cable according to claim 1 is characterized by: The conductor (1) is one of stranded bare copper, tinned copper wire, silver-plated copper wire, bare copper conductor, silver-plated copper clad steel conductor, and silver-plated copper clad aluminum.

4. The novel insulated co-extruded dual coaxial high-speed data transmission cable according to claim 1 is characterized by: The first shielding layer (3) is pure copper foil, aluminum composite film longitudinal package, aluminum composite film wrap, copper composite film longitudinal package or copper composite film wrap, and is used for shielding transmission line signals.

5. The novel insulated co-extruded dual coaxial high-speed data transmission cable according to claim 4 is characterized in that: The second shielding layer (4) is wrapped with an aluminum composite tape and is used for reinforcement, protection and anti-interference.

6. The novel insulated co-extruded dual coaxial high-speed data transmission cable according to claim 1 is characterized by: The sheath layer (5) is one of a wrapped hot-melt PET tape, a polyethylene sheath, a polytetrafluoroethylene sheath, a polyperfluoroethylene-propylene sheath, and a polyolefin sheath.

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