CN206370299U - Integrated transmission lines for high-frequency signal and power distribution in the aviation industry - Google Patents

Abstract

The utility model discloses a comprehensive transmission line for high-frequency signal and electric power distribution used in the aviation industry, which comprises an outer sheath layer, a pull-resistant rope for flame-retardant filling is arranged inside the sheath, and a pull-resistant rope for flame-retardant filling is arranged inside the sheath. Several power distribution power lines and signal transmission line pairs are arranged around the periphery; the signal transmission line pairs include an external shielding layer, and the external shielding layer contains two cores, and the surface of each core conductor and the insulating layer of the core are wrapped A layer of semi-conductive shielding layer is covered, and the shielding layer of the signal transmission line to the outside is a self-adhesive aluminum foil wrapping shielding layer and a tinned copper wire braided shielding layer from the inside to the outside; the power supply line includes a core insulation layer on the surface, A finely stranded copper conductor is arranged in the insulation layer of the wire core. The application scheme facilitates the modular application of the modern equipment circuit board and its connectors, has good flexibility, integrated functions, is convenient for installation and maintenance, and has low application cost.

Description

Integrated transmission lines for high-frequency signal and power distribution in the aviation industry

technical field

The utility model relates to a power and signal transmission line for high-definition signal synchronous transmission real-time monitoring and intelligent remote control system for machinery and equipment manufacturing, aircraft and intelligent electrical equipment, in particular to a comprehensive transmission line for high-frequency signal and power distribution in the aviation industry.

Background technique

The existing communication cables for aircraft mainly have the following disadvantages:

When the applicant was designing a high-frequency high-definition signal transmission cable for some aviation industry companies in my country, he found that the customer deliberately required the product to have a small outer diameter, and most of the similar products currently used had low tensile strength, easy to break, and power failure. There are defects such as electromagnetic leakage interference between the line and the signal line.

In addition, most of the existing high-frequency signal lines are designed for performance optimization, ignoring the special installation space requirements of aviation equipment. The narrow and tortuous equipment space requires that the cables have sufficient strength to meet the needs of lead-through wiring. The outer diameter of the cables is required to be as small as possible to ensure that aviation equipment can vacate more space for other accessories. The cables are required to be stretched under force. It can also transmit electromagnetic signals stably and well in the environment of bending, bending and extrusion, which requires cables to avoid mutual electromagnetic interference in aviation equipment with complex electromagnetic environment. At present, the structure of communication cables for common equipment is shown in Figure 1-3. Figure 1 is a common multi-core high-frequency signal communication cable, Figure 2 is a multi-core coaxial high-frequency and large-flow communication cable, and Figure 3 is a common fiber optic cable.

Because aviation cables are related to the flight safety of aircraft, ensuring the quality and reliability of aviation cables is the most important concern in the design of this type of product. In the era of rapid development of modern industrial technology, it is important to achieve a certain performance breakthrough, but what is more important is to make a product easy to use and reliable to be valued by users. In contemporary industrial equipment manufacturing, the wire and cable products used are no longer just ordinary power distribution and signal transmission carriers, but take into account the customer's processing experience, use experience and the reliability of the concealed system.

To sum up, aiming at the existing technology, the application scheme of the utility model proposes a comprehensive transmission line for high-frequency signal and power distribution in the aviation industry. According to the design concept of easy processing, easy installation, and reliable quality, the product’s resistance is improved. Tensile strength, installation flexibility, anti-electromagnetic interference ability and signal transmission clarity.

Utility model content

Our country has entered the modern industrialized information society at a high speed, and various specific performance requirements have been put forward for wire and cable products. In the industrial wire and cable industry, there is a picture of high-quality products blooming. The application scheme provided by the utility model is a wire and cable product integrating high-definition signal transmission and power supply and power transmission functions designed in response to the production needs of my country's aviation industry. Its integrated features facilitate cable processing and installation, saving installation space. More importantly, the optimized design of this product solves the problem of electromagnetic interference between the power supply current and the signal pulse, and improves the tensile strength of the product. In order to solve the above technical problems, the specific technical solutions are:

The comprehensive transmission line for high-frequency signal and power distribution used in the aviation industry includes a sheath layer arranged on the outer layer, and a flame-retardant filling tension rope is arranged inside the protective sheath, and several power distribution cables are arranged around the flame-retardant filling tension rope. Power line and signal transmission line pair; the signal transmission line pair includes an external shielding layer, and the external shielding layer contains two wire cores, and a layer of semi-conductive shielding layer is coated between the surface of each core conductor and the core insulation layer ; The power distribution power line includes a surface core insulation layer, and a finely stranded copper conductor is arranged in the surface core insulation layer.

The above integrated transmission line for high-frequency signal and power distribution used in the aviation industry, wherein: the core is made of finely stranded soft silver-plated copper conductor, and the insulation layer of the core is made of flame-retardant radiation cross-linked polyethylene insulating material.

The above-mentioned high-frequency signal and power distribution integrated transmission line for the aviation industry, wherein: the sheath layer is made of oil-resistant, flame-retardant, low-smoke, halogen-free radiation cross-linked polyethylene sheath material, and the flame-retardant filling tension rope is made of high Strength Tensile Resistance Flame Retardant Aramid Fiber Strand Strand Fill.

The above integrated transmission line for high-frequency signal and power distribution for the aviation industry, wherein: the semi-conductive shielding layer coated on the surface of the core conductor of the signal transmission line is a conductive graphite-polyethylene semi-conductive shielding layer.

The above-mentioned high-frequency signal and power distribution integrated transmission line for the aviation industry, wherein: the signal transmission line has two layers of shielding layers on the outside, from the inside to the outside are self-adhesive aluminum foil wrapping shielding layer, tinned copper wire braided shielding layer .

The above-mentioned high-frequency signal and power distribution integrated transmission line for the aviation industry, wherein: the power distribution power line is a 300/300V or 300/500V low-voltage power distribution power line core.

The above-mentioned high-frequency signal and power distribution integrated transmission line for the aviation industry, wherein: the signal transmission line pair and the power distribution power line are three each, and are arranged alternately around the flame-retardant filling tension rope inside the sheath layer.

Compared with the prior art, the utility model has the following beneficial effects:

1) It is convenient for the modular application of modern equipment circuit boards and their connectors, with good flexibility, integrated functions, easy installation and maintenance, and low application cost;

2) The product can be used in mobile installation fields where optical fibers cannot be used. The product has a wide range of applications and is irreplaceable by optical fiber. While satisfying the user's mobile use, it also meets the user's various signal transmission needs. Through the adjustment of the number of wire cores, according to this design scheme, the equipment needs of a large number of users can be met;

3) Long service life, safe and reliable use. The product adopts mature communication cable design technology, irradiated cross-linked polyethylene material and other manufacturing processes and a perfect shielding system, which can not only ensure the stability of electromagnetic signal transmission, but also protect the product when it is damaged by external damage such as fire, flood, mechanical damage, etc. In the event of an accident, the product can still ensure that the functions of the internal components are not damaged;

4) The product is made of flame-retardant and halogen-free materials, which are suitable for electrical equipment with limited space. When burning, the cable itself does not prolong combustion and does not produce toxic gases;

5) The product shielding system is perfect and can be used in complex electromagnetic environment, which is also required by the increasingly dense user environment of electromagnetic equipment;

6) It is easy to install, has good mechanical properties such as wear resistance, impact resistance, and tear resistance. Aramid fiber with a tensile strength of about 5000N/mm ² is used in the middle, which effectively improves the tensile capacity of the cable.

Description of drawings

Figure 1 is a schematic diagram of the structure of a common multi-core high-frequency signal communication cable.

Fig. 2 is a structural schematic diagram of a multi-core coaxial high-frequency large-flow communication cable.

FIG. 3 is a schematic structural diagram of a common optical fiber cable.

Fig. 4 is a structural schematic diagram of a comprehensive transmission line for high-frequency signal and power distribution in the aviation industry in the scheme of this application.

In the picture:

1 single or stranded bare copper (tin-plated) conductor 2 HDPE high-density polyethylene insulation 3 aluminum foil shield 4 polyester tape wrapping 5 braid shield 6 flame-retardant PVC (low-smoke halogen-free polyolefin) sheath 7 multi-core Cable single or stranded bare copper (tinned) conductor 8 solid or physically foamed polyethylene insulation 9 multi-core cable aluminum foil shield or copper wire braid shield 10 polyester tape or non-woven wrapping 11 external aluminum foil shield or copper wire Braided shielding 12 multi-core cable flame retardant polyvinyl chloride (low-smoke halogen-free polyolefin) sheath 13 optical fiber 14 optical fiber paste 15PBT tube 16 filling rope 17FRP reinforcing core 18 optical cable paste 19 water blocking tape 20MDPE inner sheath 21 aramid yarn 22MDPE outer sheath

23 Fine stranded soft silver-plated copper conductor 24 Conductive graphite-polyethylene semi-conductive shielding layer 25 Flame-retardant irradiation cross-linked polyethylene core insulation layer 26 Flame-retardant filling rope 27 Distribution power cord 28 Self-adhesive aluminum foil wrapping Shielding layer 29 Tinned copper wire braided shielding layer 30 Oil-resistant, flame-retardant, low-smoke and halogen-free radiation cross-linked polyethylene sheath layer material

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

The utility model provides a comprehensive transmission line for high-frequency signal and electric power distribution used in the aviation industry.

Product structure description:

1.1 The wire core conductor adopts high-purity fine-stranded soft silver-plated copper conductor 23 (or tinned copper wire) for the electrical industry. The conductor has good electrical conductivity and tensile strength, and is suitable for installation in small spaces by users, with good flexibility , Increase the service life of the product.

1.2 A layer of thermoplastic semi-conductive material is extruded on the conductor surface of the signal transmission line to the core. The semiconductive layer is made of conductive graphite and polyethylene materials, has a certain conductivity, and plays a role in making the electric field on the surface of the conductor more uniform and orderly.

1.3 The insulation of signal transmission line pair core and power distribution power line core adopts low-smoke and halogen-free irradiation cross-linked polyethylene insulating material that is safe and environmentally friendly, low-smoke and halogen-free, good insulation performance, small electromagnetic loss, and high temperature resistance. Make the product have good high temperature resistance, radiation resistance and flame retardant properties. It can make the product work normally in the range of -30 ℃ ~ 150 ℃ when it is fixed and installed.

1.4 The internal and external electromagnetic fields of the signal transmission line pair are cut off in all directions by wrapping self-adhesive aluminum foil to ensure that the signal is not disturbed. After wrapping, the self-adhesive aluminum foil tightly bonds the wrapping gap with its own adhesive, which ensures that the cable product is bent without opening when it is used in mobile, so that it will not cause signal leakage or electromagnetic interference. The metal faces outward when the aluminum foil is wrapped.

1.5 The tinned copper wire braided shielding layer 29 plays an important role in three aspects: a. The braided layer has good structural stability to ensure that the internal components do not move when the product is moved and bent; b. The metal braided layer is resistant to strong electromagnetic fields. It has a good shielding effect and is a powerful supplement to aluminum foil shielding. The aluminum foil shielding layer has a wide shielding frequency band, but its shielding ability against strong interference is weak; c. The metal braided shielding layer can also be used as a grounding drainage component to ground the current generated by the aluminum foil or its own shielding electromagnetic interference in time.

1.6 In the middle, high-strength flame-retardant aramid fiber strands are used as the tensile rope 26 for flame-retardant filling. During the installation and use of the cable, it must bear the pulling force. Since the tensile filling rope made of aramid fiber has 5 to 6 times the strength of steel wire, it can withstand a huge pulling force, so that the main working components such as the core and shielding layer in the cable will not be damaged by external forces, and the Product safety performance and service life.

1.7 According to the modern environmental protection concept, the sheath is made of highly flame-retardant, low-smoke, halogen-free radiation cross-linked polyolefin sheath material that meets EU standards.

Technical Parameters:

2.1 Rated voltage U ₀ /U of power distribution core: 300/300V, 300/500V;

2.2 Temperature range: mobile working conditions -5℃～150℃

Fixed working conditions -30℃～150℃;

2.3 Bending radius: Minimum cable diameter for mobile working conditions × 10

Fixed working conditions Minimum cable diameter x 6;

2.4 Torsion range: max.±360°/m;

2.5 Effective bending times: 80000 times;

2.6 Product outer diameter range: 3~36mm.

Example

3.1 The wire core conductor adopts the silver-plated copper stranded conductor for electricians that meets the standard of IEC60228:2004 "Conductors of Insulated Cables", which ensures the good conductivity, electromagnetic signal transmission performance and convenient installation and operation of the product;

3.2 A layer of thermoplastic semi-conductive material is extruded on the conductor surface of the signal transmission core. The semiconductive layer is made of conductive graphite and polyethylene materials, has a certain conductivity, and plays a role in making the electric field on the surface of the conductor more uniform and orderly.

3.3 The insulation of the signal transmission line core and the power distribution power line core adopts oil-resistant, flame-retardant, low-smoke, halogen-free, and radiation cross-linked polyethylene insulation materials that are safe and environmentally friendly, low-smoke, halogen-free, good insulation performance, small electromagnetic loss, and high temperature resistance. 30, so that the product has good high temperature resistance, radiation resistance and flame retardancy. It can make the product work normally in the range of -30 ℃ ~ 150 ℃ when it is fixed and installed.

3.4 The signal transmission line adopts the twisted pair for the core, and the paired twisting and cabling process adopts matching pitch and perfect untwisting process. Twisted pitch cleverly avoids the electromagnetic resonance effect according to the signal wavelength, (such as blue/white: 7.3mm; orange/white orange: 9.7mm; green/white green: 11.3mm; brown/white brown: 13.7mm), forming a cable The pitch is 80-85mm, so that the product can maintain a good information transmission effect in the high-frequency band, and key indicators such as crosstalk, attenuation, and impedance are controlled within the design range.

3.5 The product adopts aluminum foil shielding process, which effectively guarantees the working index of the working core. The aluminum foil adopts self-adhesive aluminum foil to ensure that the aluminum foil does not slit when the product is bent and moved, thereby avoiding the leakage of electromagnetic signals.

3.6 The product adopts braided shielding armor layer, which has good structural stability (braiding density>80%), and has a good shielding effect on 30MHZ medium and low frequency pulse interference. Braided armor provides metal protection for the product and is an important part of the overall shielding system. The shielding structure is stable and reliable, the comprehensive aluminum foil shielding frequency range is 0-100MHZ, and the cable communication traffic is above 2.5Gbps.

3.7 The outer sheath is made of oil-resistant, flame-retardant, low-smoke, halogen-free irradiation cross-linked polyethylene sheath material 30. When the product encounters a fire, the product will not produce toxic smoke that will cause suffocation of personnel, and will not produce dense smoke to cover the escape route. Not to mention that it will not prolong combustion and become the ignition source of fire spread, and the internal components can still work in the case of passive combustion, which brings great convenience to fire protection. You can also choose oil-resistant sheath materials to adapt to oily environments; you can choose heat-resistant materials to meet the needs of high-temperature working environments or cold regions with extremely low temperatures; you can choose acid- and alkali-resistant sheath materials to meet the needs of chemical companies ; Waterproof materials can be selected to meet the needs of underwater wiring.

Estimated feasibility and prospect of popularization and application of the invention:

4.1 Such products can serve as a useful supplement to optical fiber products because of their complete instrument monitoring, safety prevention and control, and large-flow information transmission functions, and become terminal mobile communication lines after the integration of smart grid and "three-in-one" technology. It is easy to install, easy to maintain, low operating cost, long service life, and has obvious cost and quality advantages.

4.2 This product is suitable for the manufacture of modular equipment and the laying of intensive information systems. With its compact structure, convenient installation, and low operation and maintenance costs, it can completely enter the wiring system of electrical equipment users and become an irreplaceable communication product.

Development prospects and application fields:

5.1 It can be used in construction fields such as intelligent power distribution, water and electricity application monitoring, remote monitoring of electrical equipment, security, intelligent management of cities or communities;

5.2 It can be applied to disaster warning (such as gas leakage, water pressure overload, power grid overload, etc.);

5.3 It can also be applied to ships, mines, tunnels, marine engineering and transportation facilities with high security standards and heavy cable loads.

The above are only preferred embodiments of the present utility model, and are not used to limit the scope of protection of the present utility model. Therefore, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be Included within the protection scope of the present utility model.

Claims (7)

1. A comprehensive transmission line for high-frequency signal and power distribution in the aviation industry, characterized in that: it includes a sheath layer arranged on the outer layer, and the inside of the sheath is provided with a pull rope for flame-retardant filling, and an anti-tension rope for said flame-retardant filling. Several power distribution power lines and signal transmission line pairs are arranged around the pull rope; the signal transmission line pairs include an external shielding layer, and the external shielding layer contains two cores, and the surface of each core conductor and the insulating layer of the core A layer of semi-conductive shielding layer is covered between them; the power distribution power line includes a surface core insulation layer, and a finely stranded copper conductor is arranged in the surface core insulation layer. 2. The comprehensive transmission line for high-frequency signal and power distribution used in the aviation industry as claimed in claim 1, characterized in that: the core is made of finely stranded soft silver-plated copper conductor, and the insulating layer of the core is made of flame-retardant radiation Cross-linked polyethylene insulation. 3. The comprehensive transmission line for high-frequency signal and power distribution in the aviation industry as claimed in claim 2, characterized in that: the sheath layer is made of oil-resistant, flame-retardant, low-smoke, halogen-free radiation cross-linked polyethylene sheath material, the The tensile rope for flame-retardant filling is filled with high-strength tensile-resistant flame-retardant aramid fiber strands. 4. The integrated transmission line for high-frequency signal and power distribution in the aviation industry as claimed in claim 3, characterized in that: the semi-conductive shielding layer coated on the surface of the core conductor by the signal transmission line is conductive graphite-polyethylene semi-conductive shielding Floor. 5. The comprehensive transmission line for high-frequency signal and power distribution used in the aviation industry as claimed in claim 4, characterized in that: the signal transmission line is provided with two layers of external shielding layers, and is shielded by self-adhesive aluminum foil wrapping from the inside to the outside Layer, tinned copper wire braid shield. 6. The comprehensive transmission line for high-frequency signal and power distribution used in the aviation industry according to claim 5, characterized in that: the power distribution power line is a 300/300V or 300/500V low-voltage power distribution power line core. 7. The comprehensive transmission line for high-frequency signal and power distribution used in the aviation industry as claimed in claim 6, characterized in that: there are three pairs of signal transmission lines and three power lines for power distribution, and the inside of the sheath layer is surrounded by flame-retardant filling anti-corrosion wires. Alternate drawstring settings.