CN216450398U

CN216450398U - Strong electromagnetic resistance cable

Info

Publication number: CN216450398U
Application number: CN202121123037.5U
Authority: CN
Inventors: 杨拓; 纪宏生; 马瑞
Original assignee: Xi'an Aircraft Industry Group Hengtong Aerospace Electronic Co ltd
Current assignee: Xi'an Aircraft Industry Group Hengtong Aerospace Electronic Co ltd
Priority date: 2021-05-25
Filing date: 2021-05-25
Publication date: 2022-05-06
Anticipated expiration: 2031-05-25

Abstract

The utility model relates to a strong electromagnetic resistance cable, which comprises a stranded conductor, wherein an insulating layer is wrapped outside the stranded conductor, a semi-conducting layer is wrapped outside the insulating layer, a first shielding layer is wrapped outside the semi-conducting layer, a second shielding layer is woven outside the first shielding layer, and an outer sheath is extruded outside the second shielding layer; the utility model solves the technical problems that the traditional anti-electromagnetic cable can only be fixedly laid or slightly bent, is inconvenient for some mobile places, cannot shield magnetic signals, magnetic fields and low-frequency signals, and particularly can not bear high voltage and easily generate spark discharge and the like in some high-temperature environments and extreme environments, achieves the technical effects of greatly improving the flexibility of the cable, being convenient for multiple bending use in various mobile occasions, effectively shielding the magnetic fields, the magnetic signals and the low-frequency signals, enabling the cable to bear 6kV high voltage, not generating spark discharge and the like, and being widely applied in the extreme environments.

Description

Strong electromagnetic resistance cable

Technical Field

The utility model belongs to the technical field of wires and cables, and particularly relates to a strong electromagnetic resistant cable.

Background

Cables are generally rope-like cables made by stranding several wires or groups of wires, each group insulated from the other and often twisted around a center, the entire outer surface being covered with a highly insulating covering. The device is erected in the air or installed underground or underwater for telecommunication or power transmission. In the electronic field, the electromagnetic interference caused by electronic equipment is serious, and even normal operation of the equipment is influenced. How to effectively prevent electromagnetic interference and ensure normal operation of equipment is a problem which people want to solve all the time. The existing method for resisting electromagnetic interference is to arrange a shielding body outside a cable, the mode is limited by shell materials, shapes and sizes, the thickness of a shielding layer is not easy to set evenly, and cable components are inconvenient to install and disassemble and are difficult to take down from a cable body once being damaged, so that the operation difficulty is increased.

Because the traditional electromagnetic-resistant cable is produced by using conventional materials and only can be suitable for general environments, but along with the technical development, the service environment is increasingly complex, the requirement on the cable environment is more and more serious, the traditional electromagnetic-resistant cable can only be fixedly laid or slightly bent, and is inconvenient for some mobile places, the traditional cable shielding mostly adopts shielding structures such as copper rate and the like, although electric signals and high-frequency signals can be effectively shielded, the traditional cable shielding can not shield magnetic signals, magnetic fields and low-frequency signals, and particularly, under some high-temperature environments and extreme environments, the common cable can not bear high voltage, and phenomena such as spark discharge and the like are easily generated.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a strong electromagnetic resistant cable, which solves the technical problems that the traditional electromagnetic resistant cable can only be fixedly laid or slightly bent, is inconvenient for some mobile places, cannot shield magnetic signals, magnetic fields and low-frequency signals, and particularly can not bear high voltage and easily generate spark discharge and other phenomena under high-temperature environments and extreme environments, achieves the technical effects of greatly improving the flexibility of the cable, being convenient for multiple bending use in various mobile occasions, effectively shielding the magnetic fields, the magnetic signals and the low-frequency signals, enabling the cable to bear 6kV high voltage, not generating spark discharge and the like, and being widely applied in extreme environments.

In order to achieve the purpose, the specific technical scheme of the utility model is as follows:

a strong electromagnetic resistant cable comprises a stranded conductor, wherein an insulating layer is wrapped outside the stranded conductor, a semi-conducting layer is wrapped outside the insulating layer, a first shielding layer is wrapped outside the semi-conducting layer, a second shielding layer is woven outside the first shielding layer, and an outer sheath is extruded outside the second shielding layer; the stranded conductor is provided with a reinforced core wire in the inner layer and a conductor wire in the outer layer, and the reinforced core wire and the conductor wire are stranded and tightly pressed.

Furthermore, the reinforcing core wire is made of silver-plated copper alloy monofilaments, and the conductor wire is made of silver-plated copper wire monofilaments.

Furthermore, the stranded conductor adopts a 37 x 0.320mm cable structure and is stranded by 1+6+12+18, the inner layer reinforcing core wires are stranded by 7 silver-plated copper alloys in the left direction, the stranding pitch diameter ratio is controlled to be 16 times, the outer layer conductor wires are stranded by silver-plated copper wires, the stranding directions of all layers are opposite, the outermost layer is in the left direction, and the outer diameter of the conductor is 2.14 +/-0.05 mm.

Furthermore, the insulating layer is made of PTFE fluoroplastic insulating materials, the concentricity is larger than 90%, the balance ratio is kept at 0.90, the skin thickness of the cable is 3.5mm, and the outer diameter is 9.14 +/-0.10 mm.

Furthermore, the semi-conductive layer is wrapped by a semi-conductive belt with the width of 20mm and the thickness of 0.8mm, the lap joint rate is 35% -50%, and the outer diameter of the cable is 12.3 +/-0.10 mm.

Further, the first shielding layer is wrapped in an overlapping mode through a copper-iron alloy belt with the width of 25mm and the thickness of 0.15mm, the overlapping rate is 50%, and the outer diameter of the cable is 12.9 +/-0.10 mm.

Furthermore, the second shielding layer is woven by 0.15mm silver-plated copper wires, the weaving density is over 90%, and the weaving outer diameter is 13.5 +/-0.10 mm.

Furthermore, the outer sheath is made of silicon rubber and TPU elastomer materials, the inner layer is made of silicon rubber, and the outer layer is made of TPU.

Further, the outer sheath is 16.0 +/-0.1 mm in outer diameter.

The utility model has the following advantages and technical effects:

1. a strong electromagnetic resistant cable comprises a stranded conductor, wherein an insulating layer is wrapped outside the stranded conductor, a semi-conducting layer is wrapped outside the insulating layer, a first shielding layer is wrapped outside the semi-conducting layer, a second shielding layer is woven outside the first shielding layer, and an outer sheath is extruded outside the second shielding layer; the stranded conductor is characterized in that a reinforcing core wire is arranged on the inner layer of the stranded conductor, a conductor wire is arranged on the outer layer of the stranded conductor, and the reinforcing core wire and the conductor wire are stranded and tightly pressed.

Because the stranded conductor adopts the stranded wire structure, the flexibility and the safety of the conductor are improved, and the cable conductor is not broken even if the stranded conductor is bent for many times, so that the smooth transmission is effectively ensured;

the insulating layer is extruded by fluoroplastic, so that the temperature resistance and the environment resistance of the cable are improved, and the electrical performance of the material is still excellent even in an extreme environment; the service life of the cable is prolonged, and the cost is reduced;

the semi-conducting layer is used for wrapping, so that the phenomena of point discharge and the like of the cable are reduced, and the high-voltage safety of the cable is enhanced;

the first shielding layer and the second shielding layer adopt complementary electromagnetic shielding structures, so that the shielding effect of the cable in various electromagnetic environments is improved, the bending performance of the cable is improved by using a wrapping structure and a weaving structure, and meanwhile, the omnibearing strength protection of the cable can be realized;

the outer sheath is made of an elastomer material, so that the flexibility and the environment resistance of the cable are improved.

The utility model solves the technical problems that the traditional anti-electromagnetic cable can only be fixedly laid or slightly bent, is inconvenient for some mobile places, cannot shield magnetic signals, magnetic fields and low-frequency signals, and particularly can not bear high voltage and easily generate spark discharge and the like under high-temperature environments and extreme environments, achieves the technical effects of greatly improving the flexibility of the cable, being convenient for multiple bending use in various mobile occasions, effectively shielding the magnetic fields, the magnetic signals and the low-frequency signals, enabling the cable to bear 6kV high voltage, not generating spark discharge and the like, and being widely applied in extreme environments.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a flow chart of the manufacturing process of the present invention.

The notation in the figure is: 1. a stranded conductor; 11. reinforcing the core wire; 12. a conductor line; 2. an insulating layer; 3. A semiconducting layer; 4. a first shielding layer; 5. a second shielding layer; 6. an outer sheath.

Detailed Description

For better understanding of the objects, structure and functions of the present invention, a flexible high definition audio cable according to the present invention will be described in further detail with reference to the accompanying drawings.

Example 1

Specifically referring to fig. 1 and 2, the strong electromagnetic resistant cable comprises a stranded conductor 1, wherein an insulating layer 2 is coated outside the stranded conductor 1, a semi-conducting layer 3 is wrapped outside the insulating layer 2, a first shielding layer 4 is wrapped outside the semi-conducting layer 3, a second shielding layer 5 is braided outside the first shielding layer 4, and an outer sheath 6 is extruded outside the second shielding layer 5; the inner layer of the stranded conductor 1 is provided with a reinforced core wire 11, the outer layer is provided with a conductor wire 12, and the reinforced core wire 11 and the conductor wire 12 are stranded and tightly pressed. The reinforcing core wire 11 is formed by twisting silver-plated copper alloy monofilaments, and the conductor wire 12 is formed by twisting silver-plated copper wire monofilaments.

The stranded conductor 1 is stranded by adopting a plurality of strands of small-section monofilaments to strengthen a core wire reinforcing structure. The reinforced core wire 11 is formed by twisting silver-plated copper alloy monofilaments, and the outer layer is twisted by silver-plated copper wires; small cross section and small outer diameter single filament twistingThe number of the single-wire strands is increased, the more the cable is soft, the more the cable is bent, and the number of times of bending the cable is increased; the multi-strand twisting effectively increases the safety of the cable, and can not generate open circuit due to the breakage of certain monofilaments; increase the service performance of the cable, this time 3mm²The cable adopts a 37 × 0.320 cable structure and adopts 1+6+12+18 regular stranding, wherein 7 cables in the center are stranded by silver-plated copper alloy, and the stranding pitch-diameter ratio is 16, so that the effect of reinforcing the core wire is achieved; the rest conductors are twisted by silver-plated copper wires, the twisting directions of all layers are opposite, the outermost layer is in the left direction, and the outer diameter of the cable is 2.14 +/-0.05 mm.

The insulating layer 2 of the cable is made of a high-quality PTFE fluoroplastic insulating material, and has excellent electrical properties such as voltage resistance, arc resistance and high insulation resistance, and excellent environmental resistance such as high temperature resistance and cracking resistance. The cable is formed by extruding the high-temperature extruder, the conductor and the insulating layer are in tight contact, the overall structure of the cable is smooth and attractive, and the skin thickness of the cable is 3.5 mm.

The semi-conducting layer 3 adopts 20mm width, and the conducting lapping tape of 0.8mm thickness half carries out overlap joint around the package, and the lapping percentage is 50%. Semi-conductive when can effectively solve the cable high pressure around the package, the high voltage discharge of insulating production because of irregularity guarantees cable high pressure safety in utilization.

The first shielding layer 4 is wrapped by copper-iron alloy foil with 40% iron content. At this time, overlapping lapping is carried out by adopting a copper-plastic composite foil with the width of 25mm and the thickness of 0.15mm, and the lapping rate is 35-50%. The copper-iron alloy has the advantages of two materials of copper and iron. Compared with iron, the shielding material has excellent diamagnetism, can effectively shield external magnetic signals and magnetic fields, and particularly has better shielding effect on low-frequency signals than other metals. Because of containing copper, the copper alloy has more ductility phases than iron metal, is convenient to process, has light weight and better tensile strength than copper, and is more economical and practical than copper. However, the shielding effect of high-frequency signals is inferior to that of copper materials, so that the shielding structure of the copper materials is needed to be used for supplement so as to ensure that the cable shields electric fields and magnetic fields.

The second shielding layer 5 is woven by silver-plated copper wires. At this time, the silver-plated copper wire with the thickness of 0.15mm is adopted for weaving, and the weaving density is larger than 90%. Copper has excellent electric signal shielding effect and can effectively avoid the influence of high-frequency electromagnetic signals on cables. The weaving can form a closed cylindrical shielding layer at the periphery of the cable, and according to the Gauss law, the closed cylindrical shielding layer can effectively shield an external electric field and ensure that the internal electric field is zero; but because of the magnetic conductivity problem of copper material, it can't effectively shield the magnetic field, so some strong magnetic environment very easily produce the response to the cable, influence safety, it shields the collocation with the ferrocopper alloy, can effectively shield the electromagnetic signal of various frequency channels, guarantees cable safety.

The outer sheath 6 is extruded using a high performance TPU high temperature resistant elastomer. The elastomer material has the flexibility of rubber, and has excellent high temperature resistance and environmental resistance; compared with common materials, the material is soft, flame retardant, superior in environmental resistance and low in price; elastomers are desirable jacket materials; the sheath is made of silicone rubber and TPU elastomer materials, the inner layer is extruded from the silicone rubber, and the outer layer is extruded from the TPU.

The process for manufacturing the soft high-definition audio cable comprises the following steps:

1) the conductor wire core is manufactured by twisting a plurality of conductors, and a special processing technology and a mould are adopted in the design and manufacturing process. The conductor is tightly and uniformly compressed, and the cable can safely transmit current under the high-voltage condition. The outer layer of the conductor is drawn and pressed by adopting a multi-layer stranded wire die, so that the surface of the wire core is smooth and flat.

2) The insulation processing adopts the uniform hot extrusion coating of the conventional high-temperature fluoroplastic extrusion equipment, the production speed and the extrusion temperature are controlled by a computer, the stable extrusion performance index is obtained, and the outer diameter deviation of the cable is not more than +/-0.1 mm.

3) And a conductive cloth wrapping structure is adopted, so that the insulating surface of the cable is round and smooth, and the discharge phenomenon is reduced.

4) The shielding wrapping adopts copper-iron alloy foil for overlapping wrapping, 35% -50% of overlapping is carried out, the cable core wires are tightly embraced through drawing of a die, and the electromagnetic shielding effect is increased and decreased.

4) Weaving by adopting silver-plated copper; the weaving density is more than 90%, the surface weaving is round, and no jumping yarn and burr exist.

5) The sheath is extruded by the elastomer, extruded, round and compact in surface and resistant to bending and abrasion of the cable.

The product technological parameter table of the utility model:

in conclusion, the utility model solves the technical problems that the traditional anti-electromagnetic cable can only be fixedly laid or slightly bent, is inconvenient for some mobile places, and magnetic signals, magnetic fields and low-frequency signals cannot be shielded, and particularly under some high-temperature environments and extreme environments, the common cable cannot bear high voltage and is easy to generate phenomena such as spark discharge, and the like, thereby greatly improving the flexibility of the cable, being convenient for multiple bending use in various mobile occasions, effectively shielding the magnetic fields, the magnetic signals and the low-frequency signals, leading the cable to bear 6kV high voltage, not generating phenomena such as spark discharge, and the like, and achieving the technical effect of wide application in extreme environments.

It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from the essential scope thereof. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims

1. A strong electromagnetic resistance cable is characterized by comprising a stranded conductor (1), wherein an insulating layer (2) is coated outside the stranded conductor (1), a semi-conducting layer (3) is wrapped outside the insulating layer (2), a first shielding layer (4) is wrapped outside the semi-conducting layer (3), a second shielding layer (5) is woven outside the first shielding layer (4), and an outer sheath (6) is extruded outside the second shielding layer (5); the stranded conductor (1) is provided with a reinforced core wire (11) on the inner layer and a conductor wire (12) on the outer layer, wherein the reinforced core wire (11) and the conductor wire (12) are stranded and pressed tightly.

2. The strong electromagnetic resistant cable according to claim 1, characterized in that the reinforcing core wire (11) is silver-plated copper alloy monofilament and the conductor wire (12) is silver-plated copper wire monofilament.

3. The strong electromagnetic resistant cable according to claim 2, wherein the stranded conductor (1) adopts a 37 x 0.320mm cable structure, 1+6+12+18 stranding is adopted, the inner layer reinforcing core wire (11) is stranded by 7 strands by using silver-plated copper alloy, the stranding pitch ratio is controlled to be 16 times in the left direction, the outer layer conductor wire (12) is stranded by using silver-plated copper wires, the stranding directions of all layers are opposite, the outermost layer is in the left direction, and the outer diameter of the conductor is 2.14 +/-0.05 mm.

4. The high-electromagnetic-resistance cable according to claim 2, wherein the insulating layer (2) is made of PTFE fluoroplastic insulating material, the concentricity is more than 90%, the balance ratio is kept at 0.90, the cable skin is 3.5mm thick, and the outer diameter is 9.14 +/-0.10 mm.

5. The strong electromagnetic resistant cable according to claim 1, wherein the semi-conductive layer (3) is wrapped by a semi-conductive tape with a width of 20mm and a thickness of 0.8mm, the lap joint ratio is 35-50%, and the outer diameter of the cable is 12.3 +/-0.10 mm.

6. The strong electromagnetic resistant cable according to claim 1, wherein the first shielding layer (4) is lapped with a copper-iron alloy tape with a width of 25mm and a thickness of 0.15mm, the lapping rate is 50%, and the outer diameter of the cable is 12.9 +/-0.10 mm.

7. The strong electromagnetic resistant cable according to claim 1, wherein the second shielding layer (5) is braided by using 0.15mm silver-plated copper wires, the braiding density is more than 90%, and the outer diameter of the braid is 13.5 +/-0.10 mm.

8. The high-electromagnetic-resistance cable according to claim 1, wherein the outer sheath (6) is made of silicone rubber and TPU elastomer material, the inner layer is made of silicone rubber, and the outer layer is made of TPU.

9. Strong electromagnetic resistance cable according to claim 8, characterized in that the outer sheath (6) has an outer diameter of 16.0 ± 0.1 mm.