CN110993162A - Flexible nuclear-resistant reinforced cable and manufacturing method thereof - Google Patents
Flexible nuclear-resistant reinforced cable and manufacturing method thereof Download PDFInfo
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- CN110993162A CN110993162A CN201911179623.9A CN201911179623A CN110993162A CN 110993162 A CN110993162 A CN 110993162A CN 201911179623 A CN201911179623 A CN 201911179623A CN 110993162 A CN110993162 A CN 110993162A
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/02—Stranding-up
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
- H01B13/145—Pretreatment or after-treatment
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
- H01B13/148—Selection of the insulating material therefor
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/26—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
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- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/26—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
- H01B13/2606—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by braiding
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- H01B7/00—Insulated conductors or cables characterised by their form
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- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
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- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
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- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/2806—Protection against damage caused by corrosion
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Abstract
The invention relates to a flexible anti-nuclear reinforced cable and a manufacturing method thereof, and the flexible anti-nuclear reinforced cable comprises a central framework, a cable core unit, a polyester wrapping layer, a metal shielding layer and a polyurethane sheath layer from inside to outside, and is characterized in that: the invention provides a flexible anti-nuclear reinforced cable, which aims to solve the problems that the flexibility of the conventional anti-nuclear electromagnetic pulse cable is poor, the cable conductor is broken and separated due to uneven stress on the bent part of the cable, and the use requirement of a nuclear weapon on the flexible anti-electromagnetic pulse cable cannot be met.
Description
Technical Field
The invention belongs to the field of cables, and particularly relates to the field of nuclear electromagnetic pulse resistant reinforced cables.
Background
The existing flexible anti-electromagnetic pulse cable mainly comprises a plurality of layers of metal woven and composite film lapping shields, and the flexibility of the whole cable is realized by improving the flexibility of a shielding material, for example, the shielding material adopts flexible conductive cloth or a metal wire woven structure. The core wires of the cable are mainly arranged regularly, the core wires of all layers are mutually extruded in the bending process, and the core wire of the inner layer can be extruded by one circle of core wires at the outer side. During bending in a severe field use environment, the cable is subjected to an extremely small bending radius, the bending times can reach thousands of times, flexibility of the cable is a great challenge, the cable can last for a long time under a large bending angle, and if the bending stress or the bending radius exceeds the use range for a long time, the cable can be broken during connection, so that the whole cable loses function. Therefore, the normal cable core structure of the existing flexible electromagnetic pulse resistant cable seriously reduces the flexibility of the cable and is not beneficial to being used in the field extreme bending environment.
In addition, the regular cabling structure of the conventional electromagnetic pulse resistant cable results in poor flexibility. FIG. 1 is a prior art heart yearn stranding structure chart, and inside heart yearn adopts the normal stranding structure of 1+6+12+18+ … …, and this kind of cable core structure has fabulous stability, but because the inside insulating heart yearn that is densely covered of cable core, lead to the cable bending process, extrude each other between the inside each heart yearn of cable core, no stress release space, this causes the influence to the compliance of whole cable, can't satisfy the user demand to soft anti-electromagnetic pulse cable in the nuclear weapon.
In order to meet the use requirements of the field electromagnetic pulse resistant cable, the flexible electromagnetic pulse resistant cable is urgently needed to be made from the aspects of materials, cable structures and the like, and the field environment performance, flexibility and high-reliability use performance of the flexible electromagnetic pulse resistant cable are achieved.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a flexible anti-nuclear reinforced cable and a manufacturing method thereof, so as to solve the problems that the flexibility of the conventional anti-nuclear electromagnetic pulse cable is poor, and the conductor of the cable is broken and separated due to uneven stress on the bent part of the cable, so that the use requirement of the flexible anti-nuclear electromagnetic pulse cable in a nuclear weapon can not be met.
In order to solve the above technical problem, the technical solution of the present invention is realized as follows:
the utility model provides a flexible anti nuclear reinforced cable, includes from inside to outside that central skeleton 2, cable core unit 1, polyester wind covering 3, metallic shield layer, polyurethane restrictive coating 8, its characterized in that: the flexible anti-nuclear reinforced cable further comprises a central framework 2 arranged at the center of the cable, wherein the central framework 2 is made of thermoplastic elastomer materials and isolates the cable core units 1 in the wrapping space of the wrapping layer 3 respectively.
Further, the central framework 2 is made of TPEE material, TPU material or rubber material.
Furthermore, the number of the cable core units 1 is four, the cross section of the central framework 2 is cross-shaped, and the cable core units 1 are respectively arranged at four corners of the central framework 2 and are isolated.
Furthermore, the number of the cable core units 1 is eight, and the cross section of the central framework 2 is of a structure shaped like a Chinese character 'mi'.
Further, the wrapping layer 3 is made of a transparent polyester tape material with the thickness of 0.03 mm.
Further, the metal shielding layer is a first silver-plated copper braid layer 4, a copper-nickel alloy cloth tape wrapping layer 5, a nickel-iron alloy tape wrapping layer 6 and a second silver-plated copper braid layer 7 from inside to outside in sequence.
The manufacturing method of the flexible nuclear-resistant reinforced cable comprises the steps of cabling assembly, weaving, lapping, weaving and sheath extrusion, and is characterized in that:
the method comprises the following steps: manufacturing a cable core unit, twisting the prepared thirteen-core insulated core wires, wherein the twisted structure is that the inner part is 3 cores and the outer part is 10 cores, synchronously wrapping a polyester film wrapping tape on the outer layer after twisting to manufacture the cable core unit, and the outer diameter of the manufactured cable core unit is 4.1-4.3 mm;
step two: the cable core units are distributed at four corners of the central framework for cable assembly, and transparent polyester tapes are wrapped around the cable core units after the cable assembly to ensure the stability of the cable core;
step three: processing the shielding layer, namely weaving silver-plated copper wires outside the cable core by adopting a 24-spindle high-speed weaving machine, wherein the weaving density is not less than 95%; then, wrapping a copper-nickel alloy cloth belt and a nickel-iron alloy belt on a wrapping machine, wherein the wrapping of the copper-nickel alloy cloth belt and the alloy belt adopts a 50% overlapping form; then weaving silver-plated copper wires outside the nickel-iron alloy belt by adopting a 24-spindle high-speed weaving machine, wherein the weaving density is not less than 97%;
step four: extruding the outer sheath, namely extruding a layer of outer sheath consisting of polyurethane thermoplastic elastomer outside the shielding layer, wherein the extrusion die adopts a sleeve type, the outer diameter of the prepared cable is 14.0-15.2 mm, and the wall thickness of the outer sheath is not less than 1.2 mm.
Further, the insulated core wire in the first step is prepared by the following steps:
step 1.1: selecting a conductor, namely selecting a stranded silver-plated copper stranded wire as the conductor, wherein the stranding pitch diameter ratio is 12-16, and the outer diameter of the conductor is 0.60-0.64 mm;
step 1.2: and (3) insulating extrusion molding, namely adopting the silver-plated copper stranded wire prepared in the step 1.1 as a conductor, extruding silicon rubber outside the stranded conductor and vulcanizing to prepare an insulating core wire with the outer diameter of 0.9-1.1 mm.
Furthermore, in the second step, the number of the cable core units is 4, and the central framework is in a cross shape.
The invention can bring the following beneficial effects:
according to the invention, by designing the cable core structure and materials of the flexible cable, the bending stress borne by the electromagnetic pulse resistant cable in the bending process is transferred to the cable internal filling and cable shielding part, so that the fracture and separation of the cable conductor caused by uneven stress on the cable bending part are prevented, and the use reliability of the electromagnetic pulse resistant cable is effectively improved.
The invention discloses a method for separating a flexible electromagnetic pulse resistant cable into a flexible cable and an electromagnetic pulse resistant cable by adopting a separation-integration technology, wherein the flexible cable is realized mainly on the structural form of a cable core, the electromagnetic pulse resistant cable is realized mainly on the structure of a shielding layer, the main solutions of the two cables are integrated into the flexible electromagnetic pulse resistant cable comprehensively, and the cable is ensured to have both the flexibility and the electromagnetic pulse resistant performance through a proper processing technology, so that the defect of poor flexibility of the common electromagnetic pulse resistant cable is overcome.
The invention discloses a flexible electromagnetic pulse resistant cable made of a novel material by researching the mechanical properties of various materials and selecting a proper flexible electromagnetic pulse resistant cable material.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic structural diagram of a conventional nuclear-resistant electromagnetic pulse cable;
FIG. 2 is a schematic diagram of the central skeleton structure of the flexible nuclear-resistant reinforced cable of the present invention;
FIG. 3 is a schematic view of a flexible nuclear-resistant reinforced cable according to the present invention;
FIG. 4 is a flow chart of a method for manufacturing the flexible nuclear-resistant reinforced cable according to the present invention;
in the figure:
1 core wire 2 central framework 3 lapping layer
4 first silver-plated copper braided layer 5 copper-nickel alloy strap wrapping layer
6 ferronickel alloy band is around 7 second silver-plated copper weaving layers of covering
8 polyurethane sheath layer
Detailed Description
To further explain the technical means, the creation features, the achievement objects and the effects of the present invention, the following detailed description will be provided with reference to the accompanying drawings and the preferred embodiments for describing the specific implementation, the structure, the features and the effects of the flexible anti-nuclear reinforced cable and the manufacturing method thereof according to the present invention.
Example 1
Like fig. 3, a flexible anti nuclear reinforcement cable includes from inside to outside central skeleton 2, cable core unit 1, polyester around covering 3, shielding layer, polyurethane restrictive coating 8, and central skeleton 2 is the TPEE material and keeps apart cable core unit 1 respectively around covering 3 in the space. The number of cable core units 1 is four, and 2 cross-sections of center skeleton are cross, cable core unit 1 is arranged in respectively 2 four corners of center skeleton are kept apart, adopt the transparent polyester tape material that thickness is 0.03mm around covering 3, and the shielding layer is first silvered copper weaving layer 4, copper-nickel alloy strap around covering 5, ferronickel alloy area around covering 6, second silvered copper weaving layer 7 from inside to outside in proper order. Adopt multilayer shielding to shield electromagnetic pulse, through improving intensity, corrosion-resistant and pyroelectricity nature around the package copper-nickel alloy strap to reduce resistivity temperature coefficient. And additionally adding a layer of low-frequency soft magnetic material nickel-iron alloy belt with high magnetic permeability and low coercive force.
Fig. 2 is the flexibility center skeleton structure chart of novel flexible anti nuclear reinforcement cable, and center skeleton adopts the TPEE material, and the long-term operating temperature of this kind of material is about 105 degrees, and to playing support and fixed action this kind of material can satisfy anti nuclear reinforcement cable's operation requirement completely, and the compliance of this kind of material is fine moreover, can kick-back to original state under very little bending radius, and the performance influence to the conductor falls to minimumly. The cable is receiving the exogenic action, extrudeing each other between the heart yearn, through the direct contact of central skeleton with the heart yearn for the atress position is used in on the skeleton, realizes the skeleton atress, makes the heart yearn warp under the minimum.
The dimensional requirements of each layer in the novel flexible electromagnetic pulse resistant cable are shown in table 1. Cabling, weaving, lapping, weaving and extruding are carried out on each part in the interior in sequence according to the structure of figure 3 and the sequence of figure 4:
the method comprises the following steps: manufacturing a cable core unit, twisting the prepared thirteen-core insulating core wires, wherein the twisted structure is that the inner part is 3 cores and the outer part is 10 cores, synchronously wrapping a polyester film wrapping tape on the outer layer after twisting to manufacture the cable core unit, and the outer diameter of the manufactured cable core unit is about 4.2 mm;
step two: and (3) assembling cabling, namely symmetrically arranging cable cores of the cable cores on a cabling machine, arranging the cable coils of the central framework at the central position of the cabling machine, then distributing the cable cores at four corners of the central framework for assembling cabling, and wrapping a transparent polyester tape behind the assembled cabling to ensure the stability of the cable cores.
Step three: processing the shielding layer, namely weaving silver-plated copper wires outside the cable core by adopting a 24-spindle high-speed weaving machine, wherein the weaving density is 95%; then, wrapping a copper-nickel alloy cloth belt and a nickel-iron alloy belt on a wrapping machine, wherein the wrapping of the copper-nickel alloy cloth belt and the alloy belt adopts a 50% overlapping form; and then weaving silver-plated copper wires outside the nickel-iron alloy belt by adopting a 24-spindle high-speed weaving machine, wherein the weaving density is not less than 97%.
Step four: extruding the outer sheath, namely extruding a layer of outer sheath consisting of polyurethane thermoplastic elastomer outside the shielding layer, wherein the extruding mould adopts a sleeve type, so that the outer diameter of the prepared cable is about 14.4mm, and the wall thickness of the outer sheath is about 1.2 mm.
Wherein, the insulated core wire in the step one is prepared by the following steps:
step 1.1: selecting a conductor, namely selecting a stranded silver-plated copper stranded wire as the conductor, wherein the stranding pitch diameter ratio is about 12, and the outer diameter of the conductor is about 0.60 mm;
step 1.2: and (3) insulating extrusion molding, namely adopting the silver-plated copper stranded wire prepared in the step 1.1 as a conductor, extruding silicon rubber outside the stranded conductor and vulcanizing to prepare an insulating core wire with the outer diameter of about 0.90 mm.
The outer diameter of the cabling unit is not more than 4.2 mm.
Make flexible cable through technologies such as assembly cable, weave, around package, crowded sheath, finished product cable structure size: not greater than 15.2 mm. The structural dimensions of each part of the cable are shown in table 1:
TABLE 1 structural dimensions of the various parts of the cable
Description of the technical effects and design principles of embodiment 1:
1. cable core unit and cable core support design
According to the requirement of the soft performance of the soft cable, a proper cable core unit structure combination is designed for realizing the use of the core wire under a specific bending condition. And a layer of silicon rubber is extruded outside the conductor, so that the stability and the flexibility of the conductor are improved. The core wire adds compliance cross skeleton at the stranding in-process, makes the cable conductor stress distribution on cross skeleton at the bending in-process to reduce the bending stress of core wire, can resume the circularity after the bending, four directions of center skeleton add respectively that a center layer is three cores, the skin is the core wire transposition structure of ten cores, as shown in fig. 2.
The central framework adopts thermoplastic polyester elastomer flexible material (TPEE), which has high flexural modulus and does not have over-hardness phenomenon at low temperature. The structure of the cable solves the problem of influence of core wires of the anti-nuclear reinforced cable and a common cabling structure on flexibility to a certain extent, so that the structure of the cable is more stable in the bending process.
Change traditional anti electromagnetic pulse cable core and add packing strip or formal heart yearn compound mode at the center, this soft anti nuclear reinforcement cable adopts and cuts apart into four little cable parts to the heart yearn and winds the package, the rethread adds central skeleton to the cable center, make the heart yearn of four directions of central skeleton when receiving external force and extrusion, provide the flexible space for the heart yearn, the stress point is used in on the soft skeleton at center, softness and recoverability through central skeleton, even the cable also can resume the former state in very little bending radius. The combination has smaller bending radius to a certain extent, and is convenient to use in the field under complex working condition environment.
2. Insulation material design
The innovative conductor of this patent extrudes one deck silicon rubber outward and insulates and provide the bendability for the heart yearn for the conductor, and the bending property and the bending radius of silicon rubber compare in ordinary anti-electromagnetic pulse cable core insulating material more have the advantage. The silicon rubber has high temperature resistance, can meet the relevant temperature resistance requirements of cables, has excellent insulating property, and very good corona resistance and arc resistance, and has better flexibility of core wires and reduced influence of bending on leads by resisting extrusion molding of the silicon rubber on electromagnetic pulse cable conductors.
The cable is connected to corresponding equipment, the flexibility of the cable is tested, the length of the cable is 1.5 m, the cable is subjected to cable counterweight, the counterweight weight is 25 times of the self cable weight, the cable can recover 80% of the original state after counterweight for 24 hours, and the cable is insulated well. The bending performance of the cable is tested, after the cable is bent 3000 times, the electrical performance of each part in the cable is intact, and the electromagnetic pulse resistance can still meet the requirement; and the postures of all parts of the cable are good, and the actual use requirements are completely met.
Example 2
On the basis of the embodiment 1, the central framework 2 is replaced by TPU material, the number of the cable core units 1 is eight, the cross section of the central framework 2 is of a structure shaped like a Chinese character 'mi', and the cable core units 1 are respectively and independently separated by the Chinese character 'mi' framework. The preparation steps are also adjusted on the basis of the example 1:
the method comprises the following steps: and manufacturing a cable core unit, twisting the prepared thirteen-core insulating core wires, wherein the twisted structure is 3 cores inside and 10 cores outside, and synchronously wrapping a polyester film wrapping tape on the outer layer after twisting to manufacture the cable core unit, wherein the outer diameter of the manufactured cable core unit is about 4.2 mm.
Step two: and (3) assembling cabling, namely symmetrically arranging the cable drums of the cable core units on a cabling machine, arranging the cable drums of the central framework at the central position of the cabling machine, then distributing the cable core units at each corner of the central framework for assembling cabling, and wrapping a transparent polyester tape behind the assembled cabling to ensure the stability of the cable core.
Step three: processing the shielding layer, namely weaving silver-plated copper wires outside the cable core by adopting a 24-spindle high-speed weaving machine, wherein the weaving density is 97%; then, wrapping a copper-nickel alloy cloth belt and a nickel-iron alloy belt on a wrapping machine, wherein the wrapping of the copper-nickel alloy cloth belt and the alloy belt adopts a 50% overlapping form; and then weaving silver-plated copper wires outside the nickel-iron alloy belt by adopting a 24-spindle high-speed weaving machine, wherein the weaving density is not less than 97%.
Step four: extruding the outer sheath, namely extruding a layer of outer sheath consisting of polyurethane thermoplastic elastomer outside the shielding layer, wherein the extrusion die adopts a sleeve type, so that the outer diameter of the prepared cable is about 20.8mm, and the wall thickness of the outer sheath is about 1.4 mm.
Further, the insulated core wire in the first step is prepared by the following steps:
step 1.1: selecting a conductor, namely selecting a stranded silver-plated copper stranded wire as the conductor, wherein the stranding pitch diameter ratio is about 12, and the outer diameter of the conductor is about 0.60 mm;
step 1.2: and (3) insulating extrusion molding, namely adopting the silver-plated copper stranded wire prepared in the step 1.1 as a conductor, extruding silicon rubber outside the stranded conductor and vulcanizing to prepare an insulating core wire with the outer diameter of about 0.90 mm.
Through test detection, the novel flexible electromagnetic pulse resistant cable is bent 3000 times under the bending radius of 10 times of the outer diameter of the novel flexible electromagnetic pulse resistant cable, the performance of the cable is not obviously changed in all aspects, and the use requirement of the cable is met.
Example 3
On the basis of the embodiment 1, the central framework 2 is replaced by a rubber material, and the cable is bent 3000 times through experimental detection, so that the performance of the cable is not obviously changed in all aspects, and the use requirement of the cable is met.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. The utility model provides a flexible anti nuclear reinforced cable, includes from inside to outside central skeleton (2), cable core unit (1), polyester around covering (3), metallic shield, polyurethane restrictive coating (8), its characterized in that: the flexible anti-nuclear reinforced cable further comprises a central framework (2) arranged at the center of the cable, wherein the central framework (2) is made of thermoplastic elastomer materials and isolates the cable core units (1) in the wrapping space around the covering (3).
2. The flexible, nuclear-resistant reinforced cable of claim 1, wherein: the central framework (2) is made of TPEE material, TPU material or rubber material.
3. The flexible, nuclear-resistant reinforced cable of claim 1, wherein: the cable core unit (1) quantity is four, center skeleton (2) cross-section is the cross, cable core unit (1) is arranged in respectively center skeleton (2) four corners is kept apart.
4. The flexible nuclear-resistant reinforced cable according to claim 1, 2 or 3, wherein: the cable core units (1) are eight in number, and the cross section of the central framework (2) is of a structure shaped like a Chinese character 'mi'.
5. The flexible nuclear-resistant reinforced cable according to claim 1, 2 or 3, wherein: the wrapping layer (3) is made of a transparent polyester tape material with the thickness of 0.03 mm.
6. The flexible nuclear-resistant reinforced cable according to claim 1, 2 or 3, wherein: the metal shielding layer is sequentially a first silver-plated copper braid layer (4), a copper-nickel alloy woven tape wrapping layer (5), a nickel-iron alloy woven tape wrapping layer (6) and a second silver-plated copper braid layer (7) from inside to outside.
7. The manufacturing method of the flexible nuclear-resistant reinforced cable comprises the steps of cabling, weaving, lapping and sheath extruding, and is characterized in that:
the method comprises the following steps: manufacturing a cable core unit, twisting the prepared thirteen-core insulated core wires, wherein the twisted structure is that the inner part is 3 cores and the outer part is 10 cores, synchronously wrapping a polyester film wrapping tape on the outer layer after twisting to manufacture the cable core unit, and the outer diameter of the manufactured cable core unit is 4.1-4.3 mm;
step two: assembling cabling, namely symmetrically arranging cable drums of cable core units on a cabling machine, arranging a cable drum of a central framework at the central position of the cabling machine, then distributing the cable core units at the corners of the central framework for assembling cabling, and wrapping a transparent polyester tape after assembling cabling to ensure the stability of the cable core;
step three: processing the shielding layer, namely weaving silver-plated copper wires outside the cable core by adopting a 24-spindle high-speed weaving machine, wherein the weaving density is not less than 95%; then, wrapping a copper-nickel alloy cloth belt and a nickel-iron alloy belt on a wrapping machine, wherein the wrapping of the copper-nickel alloy cloth belt and the alloy belt adopts a 50% overlapping form; then weaving silver-plated copper wires outside the nickel-iron alloy belt by adopting a 24-spindle high-speed weaving machine, wherein the weaving density is not less than 97%;
step four: extruding the outer sheath, namely extruding a layer of outer sheath consisting of polyurethane thermoplastic elastomer outside the shielding layer, wherein the extrusion die adopts a sleeve type, the outer diameter of the prepared cable is 14.0-15.2 mm, and the wall thickness of the outer sheath is not less than 1.2 mm.
8. The method of making a flexible, nuclear-resistant reinforced cable according to claim 7, wherein: the insulated core wire in the first step is prepared by the following steps:
step 1.1: selecting a conductor, namely selecting a stranded silver-plated copper stranded wire as the conductor, wherein the stranding pitch diameter ratio is 12-16, and the outer diameter of the conductor is 0.60-0.64 mm;
step 1.2: and (3) insulating extrusion molding, namely adopting the silver-plated copper stranded wire prepared in the step 1.1 as a conductor, extruding silicon rubber outside the stranded conductor and vulcanizing to prepare an insulating core wire with the outer diameter of 0.9-1.1 mm.
9. A method of making a flexible nuclear-resistant reinforced cable according to claim 7 or 8, wherein: in the second step, the number of the cable core units is 4, and the central framework is cross-shaped.
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