CN111312445A

CN111312445A - Ultra-flexible communication cable in 5G industrial internet digital system and manufacturing method

Info

Publication number: CN111312445A
Application number: CN202010230059.5A
Authority: CN
Inventors: 汤代兵
Original assignee: Hubei Yuhong Photoelectric Industry Co ltd
Current assignee: Hubei Yuhong Photoelectric Industry Co ltd
Priority date: 2020-03-27
Filing date: 2020-03-27
Publication date: 2020-06-19

Abstract

The invention discloses an ultra-flexible communication cable in a 5G industrial Internet digital system and a manufacturing method thereof.A conductor structure is formed by twisting a tin-plated oxygen-free copper conductor with the purity of 99.99 percent and a 250D nylon wire, the maximum value of the direct current resistance is 14 omega/100 m, and a physical foaming polyfluorinated ethylene propylene insulating layer is used on an insulating structure, so that the dielectric constant of a wire core is reduced by the structure, the low attenuation requirement of signal transmission is met, and the transmission rate of the wire core is improved. The invention relates to the technical field of communication cables. According to the super-flexible communication cable in the 5G industrial internet digital system and the manufacturing method, the cable product is finished by adopting a mode of extruding a semi-conductive surface insulating layer on a shielding structure for improving electromagnetic compatibility and by adopting a one-step method on the manufacturing method, namely, four pairs of signal lines are synchronously finished by using a special die for extruding the semi-conductive shielding material and a sheath material, the procedures of twisting, longitudinally wrapping an aluminum foil and cabling are reduced, two production procedures are reduced, and the procedure cost is reduced.

Description

Ultra-flexible communication cable in 5G industrial internet digital system and manufacturing method

Technical Field

The invention relates to the technical field of communication cables, in particular to an ultra-flexible communication cable in a 5G industrial Internet digital system and a manufacturing method thereof.

Background

With the rapid development of mobile communication, global user demand for mobile data is increasingly soaring, and it is expected that the world will formally enter the 5G era by 2021. The general transition trend of 5G networks is that mobile radio frequency devices are closer to end users to improve coverage and speed data transmission. Due to the construction limitations of conventional base stations, the solution to increase coverage is to deploy more small base stations, therefore, the coming of 5G can really drive the explosive growth of small base stations, the design specification GB50174-2017 of the domestic data center stipulates that 6A-type or above twisted-pair cables should be adopted for a horizontal subsystem bearing data services, meanwhile, higher requirements on bending resistance and flexibility of high-speed data cables applied to different environments are provided, in particular, the use of more than seven and eight types of data cables is increasing, and digital communication cables are used as important components inside base stations, particularly in terms of broadband, low attenuation, high interference resistance, high flexibility and the like, how to strengthen the design and improve the process and develop a digital communication cable better meeting the technical requirement of 5G is an important threshold in front of cable providers.

The fifth generation mobile communication technology is a novel network, is used for promoting the current mobile broadband service, is used for expanding a mobile network, and supports industrial applications such as internet of things, industrial automation control, logistics tracking, industrial AR, a cloud robot, a 5G network and the cloud robot. The 5G system integrates voice, data, image and part of control signal systems by a unified transmission medium through a combination mode of a data line and a module, and is integrated in a set of standard wiring system through a unified planning design, the system has the functions of building, network communication, information household appliance and equipment automation and provides an omnidirectional information interaction function, the traditional intelligent wiring system uses six types of digital communication cables, the highest transmission bandwidth is 250MHz, the transmission rate is 1000 Mbps, the highest transmission bandwidth for the digital communication cables in the 5G system is 2000MHz, the transmission rate is 40 Gbps, compared with the traditional high-frequency digital communication cables, the system can meet the technical index requirements of corresponding use places for places with higher requirements on network transmission performance and flexibility capacity under the condition that industrial intelligent equipment in the 5G system frequently moves, innovations must be made in the structural design and production process of cable manufacture. In addition, the traditional high-frequency digital communication cable uses polyethylene as a medium on the material, the medium constant of the material is 2.1, the signal attenuation is large when high-frequency signals (when the transmission bandwidth reaches more than 250 MHz) are transmitted, the highest temperature resistance of the traditional polyethylene insulating material is 70 ℃, the influence of the temperature of the use environment on the cable is particularly large, and the signal transmission attenuation is increased along with the increase of the temperature when the cable is in a high-temperature environment.

The invention uses fluorinated ethylene propylene material as insulating medium, uses physical foaming three-layer coextrusion technique, namely, a fluorinated ethylene propylene inner skin layer is extruded on the conductor, nitrogen is injected into the plasticized fluorinated ethylene propylene to complete polyolefin insulating layer through high pressure, so that the surface of the insulating medium is a uniform cellular foaming layer, and a solid core fluorinated ethylene propylene outer skin layer is extruded on the surface of the foaming layer, thereby preventing moisture from invading the foaming layer, ensuring that the signal transmission performance is more reliable, when the foaming degree reaches 50%, the dielectric constant is reduced from the original 2.1 to 1.57, meeting the characteristic of small signal attenuation during high-frequency transmission of cables, simultaneously reducing the production cost by 50%, and the material can resist the temperature up to 250 ℃, and ensuring that the transmission attenuation of the cables is not influenced by the environmental temperature. In addition, in order to reduce the mutual crosstalk influence of signals between the wire pairs, the traditional data cable adopts a smaller pitch among the four wire pairs during design, a certain pitch difference is formed among the four wire pairs, the pitches are respectively 9.95mm,12.1mm,15.3mm and 19.08mm, the smaller the pitch is, the larger the twisting-in rate is, and the material cost is correspondingly increased. The technology of the invention adopts the same space, namely 30mm, for the four pairs of lines when in design, so that the physical length of the cable is shortened, the production cost is reduced, the signal transmission attenuation is reduced, meanwhile, a special die is used when the sheath is extruded, a one-step method production process is adopted, namely, the original procedure of twisting, longitudinally wrapping aluminum foil, the cabling procedure is deleted, and the shielding layer and the sheath layer are simultaneously completed when the sheath is extruded, therefore, the process can meet the good anti-interference performance of the high-frequency cable, simultaneously reduce the production procedure and reduce the production cost of the product.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides an ultra-flexible communication cable in a 5G industrial Internet digital system and a manufacturing method thereof, which adopt a mode of extruding and wrapping a semi-conductive surface insulating layer on a shielding structure for improving electromagnetic compatibility, and finish the manufacturing method by using a one-step method, namely, four pairs of signal lines are extruded and wrapped with the semi-conductive shielding material and a sheath material synchronously by using a special die, the procedures of twisting and longitudinally wrapping an aluminum foil and cabling are reduced, two production procedures are reduced, the procedure cost is reduced, an outer sheath material is made of a thermoplastic polyurethane material, the semi-conductive surface shielding material and the thermoplastic polyurethane material are extruded together by using the special die through a double-layer co-extrusion method, namely, an extrusion molding host extrudes the semi-conductive shielding material on the surfaces of the four pairs of twisted pairs, and an extrusion molding auxiliary machine simultaneously extrudes the polyurethane material on the surfaces of the semi-, forming a double-layer co-extruded structure.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: the super-soft communication cable in the 5G industrial internet digital system comprises a cable core, a cable wire pair, an inner shielding layer, an outer shielding layer, a reinforcing core and an outer protective layer, wherein the cable core comprises an inner conductor and an insulating layer coated outside the inner conductor, the inner conductor is a stranded body formed by stranding a plurality of fine tinned copper wires with the purity of 99.99 percent and 250D nylon wires, the insulating layer is extruded on the surface of the inner conductor by physical foaming polyfluorinated ethylene propylene, the inner shielding layer, the reinforcing core and the outer shielding layer are arranged between the cable wire pair and the outer protective layer, a diversion wire is further arranged between the cable wire pair and the outer protective layer, the inner shielding layer and the outer shielding layer are extruded and wrapped by a semi-conductive surface shielding insulating material and the outer protective layer through a one-step method, the diversion wire is formed by stranding a plurality of tinned copper wires, and the diversion wire and the four pairs of cable cores are completed when the inner shielding layer is extruded and wrapped, the inner shielding layer and the outer shielding layer are extruded and wrapped on the surfaces of four pairs of cores by a one-step method through double-layer co-extrusion equipment, the reinforcing cores are of a multi-strand nylon yarn filling structure, and the outer shielding layer is made of a polyurethane elastomer material.

Preferably, the surface of the insulating layer is simultaneously extruded with an outer skin layer formed by mixing a solid core fluorinated ethylene propylene and fluorinated ethylene propylene color concentrates with different colors to form different color line pairs, and the thickness of the outer skin layer is 0.05 mm.

Preferably, the insulating layer has a foaming degree of 50% or more by using a physically foamed polyperfluorinated ethylene propylene structure.

Preferably, the inner shielding layer is wrapped on the surfaces of the four pairs of cores in a one-step mode by using a semi-conductive surface insulating material and double-layer co-extrusion equipment.

Preferably, the diversion line is matched with the four line pairs, so that an external interference signal can be guided to the ground.

Preferably, the outer protective layer is extruded on the surface of the outer shielding layer.

The invention also discloses a manufacturing method of the ultra-flexible communication cable in the 5G industrial Internet digital system, which comprises the following steps:

s1, firstly twisting a plurality of strands of fine tinned copper wires with the purity of 99.99 percent and 250D nylon wires into an inner conductor through twisting equipment, then extruding and coating the inner conductor with physical foaming polyfluorinated ethylene propylene, and forming an insulating layer on the surface of the inner conductor, thereby obtaining a cable core;

s2, selecting four pairs of cable cores obtained in the step S1, and then extruding the materials on the surfaces of the four pairs of cable cores by using a semi-conductive surface insulating material through a one-step method and utilizing double-layer co-extrusion equipment to form inner shielding layers on the surfaces of the four pairs of cable cores so as to obtain cable pairs;

s3, twisting a plurality of strands of nylon wires into a reinforcing core through twisting equipment, twisting a plurality of strands of tinned copper wires into a guide wire through twisting equipment, arranging and twisting the reinforcing core and the guide wire with the cable wire pair respectively, and then extruding a shielding material on the surfaces of the cable wire pair through a one-step method by utilizing double-layer co-extrusion equipment to form an outer shielding layer;

and S4, finally, extruding the polyurethane elastomer material on the surface of the outer shielding layer through extrusion equipment to form an outer protective layer on the surface of the outer shielding layer, thereby obtaining the ultra-flexible communication cable.

Preferably, the "one-step" double extrusion apparatus used in the steps S2 and S3 is manufactured by using a special die adapted to the shape and size of the ultra-flexible communication cable.

(III) advantageous effects

The invention provides an ultra-flexible communication cable in a 5G industrial Internet digital system and a manufacturing method thereof. Compared with the prior art, the method has the following beneficial effects:

(1) the ultra-flexible communication cable in the 5G industrial Internet digital system and the manufacturing method thereof are formed by twisting a tinned oxygen-free copper conductor with the purity of 99.99 percent and a 250D nylon wire on a conductor structure, the maximum value of the direct current resistance is 14 omega/100 m, a physical foaming fluorinated ethylene propylene insulating layer is used on an insulating structure, the dielectric constant of a wire core is reduced by the structure, the low-attenuation requirement of signal transmission is met, the transmission rate of the wire core is improved, the outer diameter size of the wire core is reduced under the condition of reaching the same transmission performance, a large amount of insulating materials are saved, the production cost is reduced, the foaming rate reaches 50 percent by using the physical foaming insulation, the transmission rate is 50 percent, the using amount of the insulating materials is 50 percent of the using amount of the solid core fluorinated ethylene propylene material, the maximum attenuation value is less than 120dB/100m when the frequency is 1600MHz, the near-end crosstalk attenuation value is more than or equal to 58dB/, the dielectric strength is AC,15KV, 5min does not break down. The insulation resistance is more than or equal to 5000M omega.km, and a polyolefin outer skin layer is extruded on the surface of the insulation layer, so that the pair structure is more stable, the characteristic impedance meets 100 +/-32 omega at 1600MHz, meanwhile, the cable adopts a mode of extruding a semi-conductive surface insulation layer on the shielding structure for improving the electromagnetic compatibility, and is completed by a one-step method on a manufacturing method, namely four pairs of signal lines are synchronously completed by using a special die for extruding the semi-conductive shielding material and a sheath material, the procedure of longitudinally wrapping an aluminum foil in a pair twisting way and the procedure of cabling are reduced, two production procedures are reduced, and the procedure cost is reduced.

(2) The cable product outer protective layer material is made of high flame retardant polyurethane material, the material has good bending resistance and wear resistance and acid and alkali oil corrosion resistance, the minimum value of the tensile strength is 20MPa and the minimum value of the elongation at break is 300% after air heat aging experiments (110 ℃, 168 hours), the minimum value of the tensile strength change is +/-40% and the minimum value of the elongation at break is 300% after mineral oil experiments (100 ℃, 168 hours), the overall flame retardant property of the cable meets the CM-grade flame retardant property requirement of the American underwriters laboratories, the semi-conductive surface shielding material and the thermoplastic polyurethane material are extruded together by a special die through a double-layer co-extrusion method, namely, an extrusion molding host machine extrudes the semi-conductive shielding material on the surfaces of four pairs of twisted pairs, and an extrusion molding auxiliary machine simultaneously extrudes the polyurethane material on the surface of the semi-conductive shielding material, the double-layer co-extrusion structure is formed, so that the production cost is reduced by 50%, the transmission attenuation is small, the electromagnetic compatibility is strong, and the bending resistance is strong.

Drawings

Fig. 1 is a schematic view of the construction of a communication cable according to the present invention.

In the figure: 1 inner conductor, 2 insulating layers, 3 inner shielding layers, 4 reinforcing cores, 5 diversion lines, 6 outer shielding layers and 7 outer shielding layers.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, an embodiment of the present invention provides a technical solution: the super-flexible communication cable in the 5G industrial internet digital system comprises a cable core, a cable wire pair, an inner shielding layer 3, an outer shielding layer 6, a reinforcing core 4 and an outer protective layer 7, wherein the cable core comprises an inner conductor 1 and an insulating layer 2 coated outside the inner conductor 1, the inner conductor 1 is a twisted body twisted by adopting a plurality of strands of thin tinned copper wires with the purity of 99.99 percent and 250D nylon wires, the electric conductivity of the twisted body reaches 100 percent, the bending resistance of the conductor is enhanced, the insulating layer 2 is extruded on the surface of the inner conductor 1 by using physical foaming polyfluorinated ethylene propylene, the insulating material is high-temperature resistant, the dielectric constant of the foaming insulating layer is small, the performance is stable, the inner shielding layer 3, the reinforcing core 4 and the outer shielding layer 6 are all arranged between the cable wire pair and the outer protective layer 7, a diversion wire 5 is also arranged between the cable wire pair and the outer protective layer 7, and the inner shielding layer 3 and the outer shielding layer 6 are extruded and coated by using a semi-conductive surface, the guide wire 5 is stranded by a plurality of strands of tinned copper wires, the guide wire 5 and four pairs of wire cores are extruded and wrapped on the surface of the four pairs of wire cores by double-layer co-extrusion equipment, the structure is favorable for being welded on terminal equipment to guide interference electromagnetic clutter signals into the ground and reduce interference, the inner shielding layer 3 and the outer shielding layer 6 are extruded and wrapped on the surfaces of the four pairs of wire cores by a one-step method, the method reduces the original process of longitudinally wrapping aluminum foil and cabling by pair twisting, reduces the production cost, is favorable for increasing the electromagnetic compatibility of the cable, the reinforcing core 4 is a multi-strand nylon wire filling structure, the cable is more resistant to bending in the moving process, the outer protective layer 7 is made of a polyurethane elastomer material, the material has good flame retardance, acid and alkali corrosion resistance, bending property and wear resistance, and the overall flame retardance of the cable meets the CM-grade flame retardance requirement of a laboratory of the American insurance, the surface of the insulating layer 2 is simultaneously extruded and coated with an outer skin layer mixed by solid fluorinated ethylene propylene and fluorinated ethylene propylene color masters with different colors to form different color line pairs, and the thickness of skin layer is 0.05mm, this structure is favorable to increasing the conductor adhesive force, increase the sinle silk structure return loss value, prevent moisture invasion foaming layer, be favorable to sinle silk characteristic impedance's stability, the foaming degree that insulating layer 2 used physics foaming to gather perfluor ethylene propylene structure is more than 50%, the cell structure is even, high frequency signal transmission is low for a short time, reduce material cost, internal shield layer 3 uses semiconduction face insulating material to accomplish through "one-step method" and crowds the package at four pairs of sinle silk surfaces at double-deck crowded equipment completion, be favorable to the anti-interference, water conservancy diversion line 5 and four line pair cooperations, can be with external interference signal leading-in ground, 7 crowded packages in the surface of external shield 6 of outer jacket.

s1, firstly twisting a plurality of strands of fine tinned copper wires with the purity of 99.99% and 250D nylon wires into an inner conductor 1 through twisting equipment, then extruding and coating the inner conductor 1 with physical foaming polyfluorinated ethylene propylene, and forming an insulating layer 2 on the surface of the inner conductor 1 to obtain a cable core;

s2, selecting four pairs of cable cores obtained in the step S1, and then extruding the materials on the surfaces of the four pairs of cable cores by using a semi-conductive surface insulating material through a one-step method and utilizing double-layer co-extrusion equipment, so that inner shielding layers 3 are formed on the surfaces of the four pairs of cable cores, and cable pairs are obtained;

s3, twisting a plurality of strands of nylon wires into a reinforcing core 4 through twisting equipment, twisting a plurality of strands of tinned copper wires into a guide wire 5 through twisting equipment, arranging and twisting the reinforcing core 4 and the guide wire 5 with the cable wire pair respectively, and then extruding a shielding material on the surfaces of the cable wire pair by a one-step method through double-layer co-extrusion equipment to form an outer shielding layer 6;

and S4, finally, extruding the polyurethane elastomer material on the surface of the outer shielding layer 6 through an extruding device to form an outer protective layer 7 on the surface of the outer shielding layer 6, thereby obtaining the ultra-flexible communication cable.

The present invention, the "one-step" double extrusion apparatus used in steps S2 and S3 is manufactured simultaneously using a special die adapted to the shape and size of the ultra-flexible communication cable.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1.5 super gentle communication cable in the digital system of G industry internet, its characterized in that: the cable comprises a cable core, a cable wire pair, an inner shielding layer (3), an outer shielding layer (6), a reinforcing core (4) and an outer shielding layer (7), wherein the cable core comprises an inner conductor (1) and an insulating layer (2) coated outside the inner conductor (1), the inner conductor (1) is a twisted body twisted by adopting a plurality of strands of thin tinned copper wires with the purity of 99.99 percent and 250D nylon wires, the insulating layer (2) is wrapped on the surface of the inner conductor (1) in an extruding way by physical foaming and polyfluorinated ethylene propylene, the inner shielding layer (3), the reinforcing core (4) and the outer shielding layer (6) are all arranged between the cable wire pair and the outer shielding layer (7), a diversion wire (5) is further arranged between the cable wire pair and the outer shielding layer (7), and the inner shielding layer (3) and the outer shielding layer (6) are wrapped by a semi-conductive surface shielding insulating material and the outer shielding layer (7) in an extruding way by a one-step method, the flow guide wire (5) is formed by stranding a plurality of tinned copper wires, the flow guide wire (5) and four pairs of wire cores are finished when the inner shielding layer (3) is wrapped in a squeezing mode, the inner shielding layer (3) and the outer shielding layer (6) are wrapped in four pairs of wire core surfaces in a squeezing mode through a one-step method by utilizing double-layer co-extrusion equipment, the reinforced core (4) is of a multi-strand nylon wire filling structure, and the outer protective layer (7) is made of a polyurethane elastomer material.

2. The ultra-flexible communication cable in 5G industrial Internet digitization system of claim 1, wherein: the surface of the insulating layer (2) is simultaneously extruded with an outer skin layer formed by mixing a solid core fluorinated ethylene propylene and a fluorinated ethylene propylene color master batch with different colors to form different color line pairs, and the thickness of the outer skin layer is 0.05 mm.

3. The ultra-flexible communication cable in 5G industrial Internet digitization system of claim 1, wherein: the insulating layer (2) has a foaming degree of more than 50% by using a physical foaming polyperfluorinated ethylene propylene structure.

4. The ultra-flexible communication cable in 5G industrial Internet digitization system of claim 1, wherein: the inner shielding layer (3) is extruded and wrapped on the surfaces of the four pairs of cores by using a semi-conductive surface insulating material through a one-step method and utilizing double-layer co-extrusion equipment.

5. The ultra-flexible communication cable in 5G industrial Internet digitization system of claim 1, wherein: the diversion line (5) is matched with the four line pairs, so that an external interference signal can be guided into the ground.

6. The ultra-flexible communication cable in 5G industrial Internet digitization system of claim 1, wherein: the outer protective layer (7) is extruded on the surface of the outer shielding layer (6).

7. The method for manufacturing the ultra-flexible communication cable in the 5G industrial Internet digitization system as claimed in any one of claims 1 to 6, wherein: the method specifically comprises the following steps:

s1, firstly twisting a plurality of strands of fine tinned copper wires with the purity of 99.99% and 250D nylon wires into an inner conductor (1) through twisting equipment, then extruding and coating the inner conductor (1) with physical foaming polyfluorinated ethylene propylene, and forming an insulating layer (2) on the surface of the inner conductor (1) to obtain a cable core;

s2, selecting four pairs of cable cores obtained in the step S1, and then extruding the materials on the surfaces of the four pairs of cable cores by using a semi-conductive surface insulating material through a one-step method and utilizing double-layer co-extrusion equipment to form inner shielding layers (3) on the surfaces of the four pairs of cable cores so as to obtain cable pairs;

s3, twisting a plurality of strands of nylon wires into a reinforcing core (4) through twisting equipment, twisting a plurality of strands of tinned copper wires into a guide wire (5) through twisting equipment, arranging and twisting the reinforcing core (4) and the guide wire (5) together with the cable wire pair respectively, and then extruding a shielding material on the surfaces of the cable wire pair through a one-step method by utilizing double-layer co-extrusion equipment to form an outer shielding layer (6);

and S4, finally, extruding and wrapping the polyurethane elastomer material on the surface of the outer shielding layer (6) through extrusion equipment to form an outer protective layer (7) on the surface of the outer shielding layer (6), thereby obtaining the ultra-flexible communication cable.

8. The method for manufacturing ultra-flexible communication cable in 5G industrial Internet digitization system according to claim 7, wherein: the "one-step" double extrusion apparatus used in the steps S2 and S3 is manufactured by using a special die adapted to the shape and size of the ultra-flexible communication cable.