A lightweight nuclear electromagnetic pulse resistant integrated cable and its preparation method

Abstract

The present invention discloses a light anti-nuclear electromagnetic pulse integrated cable, including a cable core and a shielding layer, wherein the cable core is formed by twisting a plurality of wire cores into a cable, and the wire core is composed of a conductor wire and an insulation; the shielding layer includes a semi-conductive cloth and a conductive graphite, and the shielding layer is wound around the cable core in a multi-layer spiral shape, and a sheath is extruded on the outer side of the shielding layer; the conductive graphite is composed of a strong adhesive layer, a graphene layer and a graphite powder layer; the present invention also proposes a corresponding preparation method, as follows: spraying strong adhesive on the semi-conductive cloth, grinding and rolling the raw graphite on a substrate, rolling and tearing the substrate continuously, and sprinkling graphite powder, and the prepared cloth belt-shaped shielding layer is wrapped around the cable core, and then extruded to form a sheath to obtain a finished cable. The present invention imitates the method for preparing graphene by mechanical method, constructs a cloth belt of substrate-semiconductor layer-strong adhesive layer-graphene layer-graphite powder layer, and wraps the cloth belt around the cable core, which greatly improves the electromagnetic shielding property, and is particularly suitable for the field of anti-nuclear electric pulse cables.

Description

Technical Field

[0001] The invention relates to the technical field of cables, and in particular to a lightweight nuclear electromagnetic pulse resistant integrated cable and a preparation method thereof. Background Art

[0002] With the development of modern military, improving the mobility of overall weapons and equipment is the top priority. If you want to improve the mobility of the overall equipment, you must consider weight reduction and mechanism design in the structural design. With the development of mechatronics and the use of multifunctional information equipment, the transmission of cables at various points is required to be reliable and stable. However, with the development of informatization and the harsh conditions of the field environment, external electromagnetic interference and internal crosstalk often affect the reliability of information transmission, resulting in information loss or untimely transmission.

[0003] In order to solve this problem, it is necessary to improve the structure of the cable and improve the overall shielding effectiveness of the cable to resist external electromagnetic interference and internal crosstalk. In order to solve this problem, the existing nuclear electromagnetic cables on the market use the means of increasing thickness and multi-level shielding to reduce the influence of electromagnetic induction. If the shielding layer is too thick, the cable will be heavy, the outer diameter will be thick, and it will be difficult to bend, which is inconvenient to install and use. In addition, the electromagnetic shielding performance will change greatly after bending and deformation, which needs to be improved urgently. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a lightweight nuclear electromagnetic pulse resistant integrated cable and a preparation method thereof.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A light-weight nuclear electromagnetic pulse resistant integrated cable comprises a cable core and a shielding layer, wherein the cable core is formed by twisting a plurality of wire cores into a cable, and the wire core is formed by a conductor wire and an insulation wrapped outside the conductor wire;

[0007] The shielding layer is wrapped around the cable core. The shielding layer is composed of semi-conductive cloth and conductive graphite bonded to one surface of the semi-conductive cloth. The shielding layer is wound around the cable core in multiple layers in a spiral shape. The total thickness of the shielding layer is not higher than 10mm. The number of layers of the shielding layer spiral structure is 5-50 layers.

[0008] A sheath is extruded on the outside of the shielding layer.

[0009] Preferably, the conductor wire is formed by twisting a plurality of silver-plated soft copper wires.

[0010] Preferably, the insulation is specifically fluoroplastic, and the purity of the fluorine-containing component of the fluoroplastic is not less than 95%.

[0011] Preferably, the semiconductive cloth is formed by uniformly coating a semiconductor layer on the surface of a base cloth tape, the semiconductor is acetylene black, and the base cloth tape is specifically a nylon tape or a rubber cloth tape.

[0012] Preferably, the conductive graphite is composed of a strong adhesive layer, a graphene layer adhered to the outside of the strong adhesive layer, and a graphite powder layer hot-rolled outside the graphene layer. The strong adhesive layer is bonded to the semiconductor layer of the semi-conductive cloth, and the thickness of the conductive graphite does not exceed 0.2 mm.

[0013] Preferably, the sheath is in particular a low density elastomeric material.

[0014] The present invention also proposes a method for preparing a lightweight nuclear electromagnetic pulse resistant integrated cable, which is characterized by comprising the following steps:

[0015] S1, spray super glue on the outside of the semi-conductive cloth, maintain a certain humidity, and keep it ready for use;

[0016] S2, grinding the raw conductive graphite into graphite sheets using a mortar grinder, and pressing the graphite sheets onto a flat and neat substrate using a hot roller at 30-100°C;

[0017] S3, rolling the semi-conductive cloth with strong glue on the substrate with the graphite sheet, so that the semi-conductive cloth is continuously bonded to the graphite sheet;

[0018] S4, wrapping the graphite powder with the semi-conductive cloth bonded with the graphite sheet to make the graphite thickness of the semi-conductive cloth more uniform, and then placing it in a high-temperature graphite coating machine, and obtaining a more uniform graphite layer through extrusion and polishing;

[0019] S5, uses semi-conductive cloth of conductive graphite to wrap the cable core, and wraps the low-density elastomer material outside the shielding layer. An extruder is used to extrude and form a sheath to obtain a finished integrated cable.

[0020] Preferably, the main component of the super glue is cyanoacrylate resin.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention imitates the method for preparing graphene by mechanical method, grinds raw graphite into graphite sheet by mortar grinder, and the graphite sheet is a layered structure composed of multiple layers of graphene, rolls the graphite sheet on the substrate, so that the graphite sheet further produces interlayer shedding, and at the same time, a strong adhesive layer is coated on the semiconductor layer of the semi-conductive cloth, so that the semi-conductive cloth has the function of tape, and the tape is continuously rolled and torn on the graphite sheet substrate to obtain a single layer or a few layers of graphene structure, and then coated with a graphite powder layer to form conductive graphite, thereby constructing a tape structure of base tape-semiconductor layer-strong adhesive layer-graphene layer-graphite powder layer, and the tape structure is wrapped around the cable core to further construct a multi-layer spirally wrapped semi-conductive-conductive shielding structure, which offsets the electromagnetic effect layer by layer, improves the electromagnetic shielding property of the present invention, and is particularly suitable for environments requiring resistance to nuclear power pulses; at the same time, the present invention uses inorganic graphite instead of metal as the conductor shielding layer, and is combined with semi-conductive semi-conductive cloth, so that the weight is greatly reduced and the shielding effect is better.

[0023] 2. The conductive graphite of the present invention has lubricity and flame retardancy, can reduce the friction between layers, improve the anti-shielding stability when the cable is bent and deformed, and further improve the shielding effectiveness.

[0024] 3. The cable product of the present invention has the advantages of light weight, high softness, flame retardancy, high temperature resistance, high shielding effectiveness, etc. It is also convenient to install and use, and is particularly suitable for the field of nuclear electromagnetic resistant cables. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of a lightweight nuclear electromagnetic pulse resistant integrated cable proposed by the present invention;

[0026] Figure 2 This is a single-layer structural analysis diagram of the shielding layer of a lightweight nuclear electromagnetic pulse resistant integrated cable proposed by the present invention;

[0027] In the figure: 1 conductor wire, 2 insulation, 3 semi-conductive cloth, 4 conductive graphite, 5 sheath. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] Reference Figure 1-2A lightweight nuclear electromagnetic pulse resistant integrated cable comprises a cable core and a shielding layer, characterized in that: the cable core is composed of a plurality of wire cores twisted into a cable, the wire core is composed of a conductor wire 1 and an insulation 2 wrapped around the conductor wire 1; the shielding layer is wrapped around the cable core, the shielding layer is composed of a semi-conductive cloth 3 and a conductive graphite 4 bonded to one surface of the semi-conductive cloth 3, the shielding layer is multi-layered and spirally wound around the cable core, the total thickness of the shielding layer is not higher than 10 mm, and the number of layers of the spiral structure of the shielding layer is 5-50; a sheath 5 is extruded on the outside of the shielding layer.

[0030] Reference Figure 1 The conductor wire 1 is formed by twisting multiple strands of silver-plated soft copper wires, the insulation 2 is specifically made of fluoroplastics, the purity of the fluorine-containing component of the fluoroplastics is not less than 95%, and the sheath 5 is specifically made of a low-density elastomer material.

[0031] Reference Figure 1 The semi-conductive cloth 3 is formed by uniformly coating a semiconductor layer on the surface of a base cloth tape, the semiconductor is acetylene carbon black, the base cloth tape is specifically a nylon tape or a rubber cloth tape, and the conductive graphite 4 is composed of a strong adhesive layer, a graphene layer adhered to the outside of the strong adhesive layer, and a graphite powder layer pressed by a hot roller outside the graphene layer. The strong adhesive layer is bonded to the semiconductor layer of the semi-conductive cloth 3, and the thickness of the conductive graphite 4 does not exceed 0.2 mm.

[0032] The present invention also proposes a method for preparing a lightweight nuclear electromagnetic pulse resistant integrated cable, comprising the following steps:

[0033] S1, spraying super glue on the outside of the semi-conductive cloth 3, maintaining a certain humidity, and keeping it ready for use;

[0034] S2, grinding the raw conductive graphite 4 into a graphite sheet by a mortar grinder, and pressing the graphite sheet onto a flat and neat substrate by a hot roller at 30-100° C.;

[0035] S3, rolling the semi-conductive cloth 3 with strong glue on the substrate with graphite sheet, so that the semi-conductive cloth 3 is continuously bonded to the graphite sheet;

[0036] S4, wrapping the semi-conductive cloth 3 bonded with the graphite sheet with graphite powder to make the graphite thickness of the semi-conductive cloth 3 more uniform, and then placing it in a high-temperature graphite coating machine, and obtaining a more uniform graphite layer through extrusion and polishing;

[0037] S5, the cable core is wrapped with a semi-conductive cloth 3 of conductive graphite 4, a low-density elastomer material is wrapped outside the shielding layer, and an extruder is used to extrude to form a sheath 5, thereby obtaining a finished integrated cable.

[0038] The present invention grinds raw graphite into graphite sheets by a mortar grinder. At this time, the graphite sheets are layered structures composed of multiple layers of graphene. The graphite sheets are rolled on a substrate to further cause interlayer shedding of the graphite sheets. At the same time, a strong adhesive layer is coated on the semiconductor layer of the semi-conductive cloth 3 to make the semi-conductive cloth 3 have the function of an adhesive tape. The adhesive tape is continuously rolled and torn on the graphite sheet substrate to obtain a single-layer or few-layer graphene structure, and then a graphite powder layer is coated to form a conductive graphite 4, thereby constructing a cloth tape structure of a base cloth tape-semiconductor layer-strong adhesive layer-graphene layer-graphite powder layer. The cloth tape structure is wrapped around the cable core to further construct a multi-layer spirally wrapped semi-conductive-conductive shielding structure, which offsets the electromagnetic effect layer by layer, improves the electromagnetic shielding property of the present invention, and is particularly suitable for environments that require resistance to nuclear power pulses. At the same time, the present invention uses inorganic graphite instead of metal as a conductor shielding layer, and is combined with a semi-conductive semi-conductive cloth 3, so that the weight is greatly reduced and the shielding effect is better.

[0039] Comparative test: compared with the effect of the same shielding effectiveness (not less than 70dB), the thickness of the shielding layer of the present invention is about 6mm, while the existing cable using a multi-level metal shielding layer requires a shielding layer of about 11mm; under the condition of multiple bending and deformation of the cable, compared with the effect of the same shielding effectiveness (not less than 70dB), the thickness of the shielding layer of the present invention is about 7mm, while the existing cable using a multi-level metal shielding layer requires a shielding layer of about 15mm, further showing that the anti-shielding stability of the present invention is better.

[0040] The overall effect of the cable product of the present invention (based on a shielding layer of 6 mm): the shielding effectiveness of the cable is not less than 70 dB in an environment where the nuclear electromagnetic pulse field strength is 50 kV / m and the spectrum is not greater than 100 MHz.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A lightweight nuclear electromagnetic pulse resistant integrated cable, comprising a cable core and a shielding layer, characterized in that: The cable core is formed by twisting a plurality of wire cores into a cable, and the wire core is composed of a conductor wire (1) and an insulating layer (2) wrapped around the conductor wire (1); The shielding layer is wrapped around the cable core, the shielding layer is composed of a semi-conductive cloth (3) and conductive graphite (4) bonded to one surface of the semi-conductive cloth (3), the shielding layer is wound around the cable core in a multi-layer spiral shape, the total thickness of the shielding layer is not higher than 10 mm, and the number of layers of the spiral structure of the shielding layer is 5-50; The outer side of the shielding layer is extruded with a sheath (5); The semi-conductive cloth (3) is formed by uniformly coating a semiconductor layer on the surface of a base cloth tape, the semiconductor being acetylene carbon black, and the base cloth tape being specifically a nylon tape or a rubber cloth tape; The conductive graphite (4) is composed of a strong adhesive layer, a graphene layer adhered to the outside of the strong adhesive layer, and a graphite powder layer pressed by a hot roller on the outside of the graphene layer, the strong adhesive layer is bonded to the semiconductor layer of the semi-conductive cloth (3), and the thickness of the conductive graphite (4) does not exceed 0.2 mm; A method for preparing a lightweight nuclear electromagnetic pulse resistant integrated cable comprises the following steps: S1, spray strong glue on the outside of the semi-conductive cloth (3), maintain a certain humidity, and keep it ready for use; S2, grinding the raw conductive graphite (4) into a graphite sheet using a mortar grinder, and pressing the graphite sheet onto a flat and clean substrate using a hot roller at 30-100° C.; S3, rolling the semi-conductive cloth (3) with strong glue on the substrate with the graphite sheet, so that the semi-conductive cloth (3) is continuously bonded to the graphite sheet; S4, wrapping the semi-conductive cloth (3) bonded with the graphite sheet with graphite powder so that the graphite thickness of the semi-conductive cloth (3) is relatively uniform, and then placing it in a high-temperature graphite coating machine, and undergoing extrusion and polishing treatment to obtain a relatively uniform graphite layer; S5, using a semi-conductive cloth (3) of conductive graphite (4) to wrap the cable core, wrapping a low-density elastomer material outside the shielding layer, and using an extruder to extrude to form a sheath (5), thereby obtaining a finished integrated cable.

2. A lightweight nuclear electromagnetic pulse resistant integrated cable according to claim 1, characterized in that: The conductor wire (1) is formed by twisting a plurality of silver-plated soft copper wires.

3. A lightweight nuclear electromagnetic pulse resistant integrated cable according to claim 1 or 2, characterized in that: The insulating layer (2) is specifically made of fluoroplastic, and the purity of the fluorine-containing component of the fluoroplastic is not less than 95%.

4. A lightweight nuclear electromagnetic pulse resistant integrated cable according to claim 1, characterized in that: The main component of the super glue is cyanoacrylate resin.

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