Low-delay flexible communication cable

Abstract

The utility model discloses a low-delay flexible communication cable, which relates to the technical field of marine communication cables, and comprises a conductor which is arranged from inside to outside and is formed by twisting a plurality of strands of wires; the insulating layer is formed by low-density PE with the density ranging from 0.910 g / cm < 3 > to 0.940 g / cm < 3 >; the protective layer comprises a plastic interlayer, an aluminum polyester layer and an aluminum strip layer are arranged on the inner side and the outer side of the plastic interlayer, and the optical coverage rate of the protective layer is 100%; the shielding layer comprises a plurality of metal braid layers; and the sheath comprises a plurality of irradiation crosslinking layers. The cable is resistant to low temperature and high temperature, and has a low delay characteristic and a good anti-fatigue characteristic.

Description

TECHNICAL FIELD

[0001] The utility model relates to marine communication cable technical field, concretely relates to a low delay flexible communication cable. BACKGROUND

[0002] At present, the communication system used in ships and offshore platforms often relies on the communication cable in the land communication equipment. However, these land communication cables do not fully consider the specific environmental conditions of ships and offshore platforms, such as high humidity, high salinity, wide temperature variation and complex electromagnetic interference, etc. at the beginning of design. And in the application scene of signal receiver and transmitting frame on the ship, cables with low delay performance, easy bending and good bending fatigue resistance are needed. The existing ordinary communication cable cannot adapt to the wide temperature variation and other factors, and has high delay and general bending fatigue resistance. SUMMARY

[0003] Technical problems to be solved by the utility model

[0004] In view of the technical problems that the existing communication cable cannot adapt to the wide temperature variation and other factors, and has high delay and general bending fatigue resistance, the utility model provides a low delay flexible communication cable, which is resistant to low temperature and high temperature, and has low delay characteristics and good fatigue resistance.

[0005] Technical scheme

[0006] To solve the above problems, the technical scheme provided by the utility model is:

[0007] A low delay flexible communication cable, comprising a conductor arranged from inside to outside, including a plurality of wire strands; an insulation layer composed of low density PE with a density of 0.910 g / cm 3 to 0.940 g / cm 3 ; a sheath layer including a plastic interlayer, the inner and outer sides of the plastic interlayer are provided with aluminum polyester layers and aluminum tape layers, the optical coverage of the sheath layer is 100%; a shielding layer including a plurality of metal braid layers; a sheath including a plurality of radiation crosslinking layers.

[0008] Multi-stranded conductors are more flexible and easier to bend than single solid conductors, making installation more convenient and reducing the risk of breakage due to excessive bending. In the case of repeated bending, the breakage of a single wire does not immediately lead to the failure of the entire conductor, as other wires can continue to conduct current. This improves the durability and reliability of the cable. In high-frequency signal transmission, skin effect causes current to concentrate on the surface of the conductor. The design of multi-stranded conductors can increase the surface area, reduce resistance, and improve signal transmission efficiency. Skin effect causes high-frequency current to concentrate on the outer surface of the conductor, and the use of multi-stranded conductors can effectively disperse the current, thereby reducing resistance and loss. Low-density PE, also known as LDPE, uses low-density polyethylene (LDPE) as an insulating material, which has good electrical insulation performance, flexibility, and low dielectric constant, which helps to reduce signal transmission delay. The sheath is composed of a plastic interlayer, an aluminum polyester layer, and an aluminum tape layer, designed to achieve an optical coverage of 100%, which means it can completely block external light interference while providing good mechanical protection against wear and tear. The multi-layer metal braid layer can effectively shield electromagnetic interference (EMI) and radio frequency interference (RFI), ensuring the quality of signal transmission. The presence of the shielding layer is crucial for ensuring the integrity of data transmission and reducing noise. The plastic interlayer is used to improve the toughness of the sheath and the overall cable. The multi-layer irradiation cross-linked layer (XLPE) provides additional heat resistance and mechanical strength. This material undergoes irradiation treatment, which changes its molecular structure, enhancing its physical properties and chemical stability, further improving the overall durability of the cable.

[0009] As an option, the insulating layer is in close contact with the conductor and the sheath.

[0010] The close-contact insulating layer can reduce signal attenuation and reflection during transmission, thereby improving signal integrity and transmission efficiency.

[0011] As an option, the plastic interlayer is bonded with the aluminum polyester layer and the aluminum tape layer.

[0012] The aluminum polyester layer and the aluminum tape layer can provide shielding effects to prevent electromagnetic interference (EMI) and radio frequency interference (RFI), while increasing mechanical strength to prevent physical damage. The close bonding of the plastic interlayer with these two layers ensures the effectiveness of these protective functions. Close bonding can prevent delamination over time or under external forces, thereby improving the durability and reliability of the cable. The bonding design can also help improve the waterproof performance of the cable, preventing moisture from penetrating into the interior of the cable and protecting the internal conductor and insulating layer from corrosion.

[0013] As an option, the shielding layer is a multi-layer shielding braid made of silver-plated copper wire.

[0014] Silver-coated copper wire has excellent electrical conductivity and reflectivity, which can effectively shield electromagnetic interference (EMI) and radio frequency interference (RFI). The multi-layer braided structure further enhances the shielding effect, enabling the cable to maintain signal purity in high-frequency signal transmission. Silver-coated copper wire has better electrical conductivity than ordinary copper wire, which helps reduce signal transmission loss and attenuation.

[0015] As an option, the shielding layer is divided into a first shielding layer and a second shielding layer.

[0016] Two layers of shielding can provide double protection, significantly reducing the impact of external interference on signal transmission. Even if one layer of shielding has defects or is not completely shielded, the other layer of shielding can make up for the deficiency, ensuring the overall shielding effect.

[0017] As an option, the optical coverage of the first shielding layer is greater than or equal to 94%, and the optical coverage of the second shielding layer is greater than or equal to 98%.

[0018] The first shielding layer provides basic shielding effect, while the second shielding layer further enhances the shielding performance, ensuring the quality of signal transmission in various complex electromagnetic environments. Optical coverage refers to the degree to which the shielding layer can block light, and is often used to measure the integrity of the shielding layer. The optical coverage of the first shielding layer is greater than or equal to 94%, meaning it can block at least 94% of light; while the optical coverage of the second shielding layer is greater than or equal to 98%, indicating that it can almost completely block light, providing nearly perfect shielding effect. High optical coverage shielding layer can effectively reduce the coupling of external interference signals, improve the purity of signal transmission, and reduce signal attenuation and distortion. Multi-layer shielding design can significantly improve the reliability of the cable, especially in applications requiring high-precision signal transmission, such as high-speed data communication, precision instrument control, etc.

[0019] As an option, the sheath is a halogen-free flame-retardant sheath made of halogen-free flame-retardant material.

[0020] Halogen-free flame-retardant materials produce less smoke when burning, which helps maintain clear vision during a fire and facilitates personnel evacuation. Traditional halogen flame-retardant materials release toxic gases (such as hydrogen halide) when burning, while halogen-free flame-retardant materials avoid the production of these toxic gases, thereby reducing the harm to human health. Halogen-free materials have less impact on the environment during production and disposal, as they do not release persistent organic pollutants (POPs) or other harmful substances, meeting environmental standards.

[0021] As an option, the sheath is subjected to high-frequency particle irradiation treatment, and the sheath is made of irradiation cross-linked material.

[0022] Irradiation crosslinked materials have higher thermal stability and can maintain their mechanical strength and elasticity at high temperatures, making them suitable for applications requiring resistance to both low and high temperatures.

[0023] Beneficial effects

[0024] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0025] The technical solution provided by this utility model comprises, from the inside out, a conductor, an insulation layer, a sheath, a shielding layer, and a protective sleeve. The conductor is composed of multiple strands of wire twisted together; the insulation layer is made of materials with a density of 0.910 g / cm³. 3 Up to 0.940 g / cm 3 It is composed of low-density PE; the sheath includes a plastic interlayer with aluminum polyester layer and aluminum strip layer on the inner and outer sides of the plastic interlayer, and the optical coverage of the sheath is 100%; the shielding layer includes multiple metal braided layers; the sheath includes multiple irradiated crosslinked layers, which are resistant to low and high temperatures, and have low delay characteristics and good fatigue resistance. Attached Figure Description

[0026] Fig. 1 A schematic cross-sectional view of a low-latency flexible communication cable provided for an embodiment of this utility model;

[0027] Fig. 2 A schematic diagram of the structure of a low-latency flexible communication cable proposed in an embodiment of this utility model;

[0028] 1. Conductor; 2. Insulating layer; 3. Sheath; 4. First shielding layer; 5. Second shielding layer; 6. Sheath. Detailed Implementation

[0029] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0030] Example

[0031] Combined with appendix Figs. 1-2 A low-latency flexible communication cable includes a conductor 1, an insulation layer 2, a sheath 3, a shielding layer, and a sheath 6 arranged from the inside out. It is used in applications requiring high reliability and low latency data transmission, such as signal receivers and transmitters on ships. Due to its good protective performance, this cable can also be used in complex electromagnetic environments.

[0032] In this embodiment, the cable is a 50 ohm cable designed for marine and offshore applications, suitable for very high frequency / ultra high frequency (VHF / UHF) communication systems. The conductor 1 of the cable is made of 7 strands of 0.75 mm silver plated copper wire, providing good conductivity and corrosion resistance. The insulating layer 2 is made of low density polyethylene (LDPE) having a density of 0.910 g / cm 3 to 0.940 g / cm 3 and a thickness of 7.25 mm (± 0.75 mm), providing excellent electrical insulation properties and flexibility, suitable for high frequency signal transmission. The insulating layer 2 is in close contact with the conductor 1 and the sheath 3.

[0033] The sheath 3 of the cable is made of aluminum polyester and aluminum tape, providing 100% optical coverage, ensuring good electromagnetic shielding effect, preventing external interference. The sheath 3 includes a plastic interlayer, and aluminum polyester and aluminum tape layers are provided on the inner and outer sides of the plastic interlayer, and the plastic interlayer increases toughness. The plastic interlayer is bonded with the aluminum polyester layer and the aluminum tape layer, and in order to achieve such close bonding, an adhesive or a hot pressing process is usually used to ensure the bonding strength between the layers.

[0034] In order to further improve the shielding effectiveness, the cable is equipped with two layers of shielding layer: the first shielding layer 4 has an optical coverage of greater than or equal to 94%, and the second shielding layer 5 has an optical coverage of greater than or equal to 98%. The shielding layer is a multi-layer shielding braid made of silver plated copper wire, in this embodiment, the first layer is a silver plated copper braid with an optical coverage of 94%, and the second layer is also a silver plated copper braid with an optical coverage of 98%. The double shielding layer design greatly reduces signal interference, ensuring the clarity and stability of signal transmission.

[0035] The overall diameter of the cable is 12.9 mm (± 0.2 mm), and the weight per unit length is 229 kg / km, and the moderate weight and diameter make it easy to install and wire. Its operating temperature range is -40 to +70 degrees Celsius, suitable for a wide range of temperature environments. The copper wire braid shielding resistance is 4.2 ohms / km, and the conductor 1 resistance is 6 ohms / km, which helps to reduce signal loss. The test voltage of the cable is 5.5 kV, ensuring safety under extreme conditions. The capacitance of the cable is 100 pF / m, and the impedance is 50 ± 2 ohms, which matches the standard 50 ohm impedance of common communication equipment, reducing reflection. The minimum bending radius is 15 times the outer diameter, ensuring that the cable is not damaged when bent. Overall, the cable ensures reliability and long life in harsh environments with its robust construction and strict specification parameters.

[0036] The jacket 6 is a halogen-free flame-retardant jacket made of halogen-free flame-retardant material. Since it does not contain halogen, the halogen-free material is easier to be recycled and reused, reducing the difficulty and cost of waste disposal. The jacket 6 includes multiple layers of radiation crosslinked layers. The jacket 6 is treated by high-frequency particle radiation, and the jacket 6 is made of radiation crosslinked material. The jacket 6 of the cable is composed of two layers of black radiation crosslinked layers, and the radiation crosslinked material is resistant to low and high temperatures, providing excellent weather resistance and wear resistance, and is suitable for use in marine environments.

[0037] The above describes the utility model and its embodiments in a schematic manner, which is not restrictive, and the drawings only show one of the embodiments of the utility model, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired thereby, without departing from the creative purpose of the utility model, similar structural modes and embodiments are not creatively designed, which should all belong to the protection scope of the utility model.

Claims

1. A low-latency flexible communication cable, characterized in that, Including settings from the inside out A conductor is composed of multiple strands of wire twisted together. The insulation layer is composed of low-density PE with a density of 0.910 g / cm³ to 0.940 g / cm³; The protective layer includes a plastic interlayer, wherein the inner and outer sides of the plastic interlayer are provided with an aluminum polyester layer and an aluminum strip layer, and the optical coverage of the protective layer is 100%. The shielding layer includes multiple layers of metal braid; Sheath, including multiple layers of irradiated cross-linked layers.

2. The low-latency flexible communication cable according to claim 1, characterized in that, The insulating layer is in close contact with the conductor and the sheath.

3. The low-latency flexible communication cable according to claim 1, characterized in that, The plastic interlayer is bonded to the aluminum polyester layer and the aluminum strip layer.

4. The low-latency flexible communication cable according to claim 1, characterized in that, The shielding layer is a multi-layered shielding braided layer made of silver-plated copper wire.

5. A low-latency flexible communication cable according to claim 1 or 4, characterized in that, The shielding layer is divided into a first shielding layer and a second shielding layer.

6. A low-latency flexible communication cable according to claim 5, characterized in that, The optical coverage of the first shielding layer is greater than or equal to 94%, and the optical coverage of the second shielding layer is greater than or equal to 98%.

7. The low-latency flexible communication cable according to claim 1, characterized in that, The sheath is a halogen-free flame-retardant sheath, made of halogen-free flame-retardant material.

8. A low-latency flexible communication cable according to claim 1 or 7, characterized in that, The sheath is treated with high-frequency particle irradiation and is made of irradiated cross-linked material.

Images