CN211699822U

CN211699822U - Multi-core shielded cable

Info

Publication number: CN211699822U
Application number: CN202020464652.1U
Authority: CN
Inventors: 沈庆录
Original assignee: Wuhan Shenyu Special Wire And Cable Co ltd
Current assignee: Wuhan Shenyu Special Wire And Cable Co ltd
Priority date: 2020-04-02
Filing date: 2020-04-02
Publication date: 2020-10-16
Anticipated expiration: 2030-04-02

Abstract

The utility model relates to a multi-core shielding cable, the cable include many insulation core, internal shield, band, internal insulation layer, outer shielding layer, outer insulating layer, fire prevention insulating layer, elastic layer, waterproof layer, double-deck sheath, evenly distributed has the insulation core in the internal shield, the internal shield extrudes outward and wraps around the band, the internal shield is the elastic shielding material, the band has set gradually from inside to outside the internal insulation layer, the outer shielding layer, the outer insulating layer, the fire prevention insulating layer, the elastic layer, the waterproof layer, double-deck sheath, the insulation core includes conductor, internal shielding layer, insulating layer, the elastic layer is the elastic strip that circumference evenly distributed, the elastic strip both ends respectively with fire prevention insulating layer and waterproof layer fixed connection, this cable is anti-interference, high soft elasticity, and the wiring is easily installed.

Description

Multi-core shielded cable

Technical Field

The utility model relates to a power cable field especially relates to a multicore shielded cable.

Background

The existing cable comprises a plurality of conductors, an insulating layer, a weaving layer and a sheath layer, wherein the conductors and the insulating layer form an insulating wire core, the weaving layer wraps the outside of the plurality of insulating wire cores, and the sheath layer wraps the outer surface of the weaving layer. Shielded cables are generally formed by twisting several or several groups of at least two conductors, with each group being twisted around a center with mutual insulation, and being entirely surrounded by a highly insulating covering. The existing cable is poor in anti-interference performance and not easy to bend in a signal transmission process, the cable with the structure is poor in external interference resistance and signal fidelity, signal distortion is easily caused, signal transmission is unstable, and transmitted images are not clear.

Disclosure of Invention

An object of the utility model is to provide an anti-interference, high soft flexible and easily install multicore shielded cable of wiring.

The utility model discloses a realize above-mentioned purpose, realize through following technical scheme, a multicore shielded cable, including many insulation core, internal shield, band, internal insulation layer, external shield, external insulation layer, fire prevention insulating layer, elastic layer, waterproof layer, double-deck sheath, evenly distributed has in the internal shield insulation core, the external crowded package of internal shield wraps the band constitutes insulation cable core, the internal shield is elastic shielding material, the band has set gradually from inside to outside the external insulation layer the external shield the external insulation layer the fire prevention insulating layer the elastic layer the waterproof layer double-deck sheath.

In order to improve an electromagnetic field generated due to unsmooth surface of the conductor and prevent a partial discharge phenomenon between the conductor and the insulating layer, the insulating wire core comprises a conductor, an inner shielding layer and an insulating layer, the inner shielding layer is arranged outside the conductor, and the insulating layer is arranged outside the inner shielding layer.

In order to realize the optimization of the structure and the effect, the further measures are as follows: the conductor is formed by stranding a plurality of metal-plated soft copper wires, the diameter of each single wire is less than or equal to 0.03mm, the inner shielding layer is a rubber layer, and the insulating layer is silicon rubber with the extrusion thickness of 0.4-4 mm.

In order to improve the anti-interference capability of the cable, the outer shielding layer is a metal net which is woven by iron-nickel alloy and has the density of more than or equal to 85%.

In order to enhance the anti-extrusion capacity of the cable, the elastic layer is elastic strips which are uniformly arranged in the circumferential direction, and two ends of each elastic strip are fixedly connected with the fireproof heat insulation layer and the waterproof layer respectively.

In order to reduce the abrasion of the cable, enhance the anti-vibration capability of the cable and prolong the service life of the cable, the double-layer sheath comprises an inner layer sheath and an outer layer sheath, the outer surface of the inner layer sheath is provided with a strip-shaped groove, the inner surface of the outer layer sheath is provided with a semicircular elastic protruding key, the outer surface of the outer layer sheath is provided with a sawtooth protruding key, and the double-layer sheath can be assembled.

The beneficial effects of the utility model reside in that:

compared with the prior art, the utility model adopts the elastic inner shielding material to fill in the gap between the insulated wire core and the wrapping tape, the inner shielding body has the functions of fixing the relative position of the insulated wire core, avoiding the extrusion friction between the wire cores, reducing the signal mutual interference between the wire cores and buffering the external impact load, in addition, the multi-layer insulating layer is coated outside the wire core to improve the insulating effect and the high-pressure resistance of the cable, ensure the use safety of the cable, effectively slow down the aging of the cable and prolong the service life of the cable, the fireproof heat-insulating layer effectively reduces the damage of the external temperature or the natural disaster to the cable, simultaneously, the waterproof layer can ensure the use safety of the cable in the water environment, prevent the oxidation of water to each part of the cable, the double-layer sheath can increase the thickness of the sheath, buffer the external impact and the vibration, and simultaneously, the sheaths of, the service time of the cable is prolonged, the protruding keys and the grooves between the sheaths can prevent the sheaths from moving in a staggered manner, the sawtooth-shaped protruding keys are arranged on the surfaces of the sheaths, vibration of the cable can be reduced, and finally each conductor is formed by twisting a plurality of soft copper wires with the diameter being less than or equal to 0.03 mm.

Drawings

Fig. 1 is a schematic structural diagram of the multi-core shielded cable of the present invention.

In the figure: 1. an insulated wire core; 2. an inner shield; 3. wrapping belts; 4. an inner insulating layer; 5. an outer shield layer; 6. an outer insulating layer; 7. a fireproof heat-insulating layer; 8. an elastic layer; 9. a waterproof layer; 10. a double-layer sheath; 11. a conductor; 12. an inner shield layer; 13. an insulating layer; 14. an inner jacket; 15. outer sheath

Detailed Description

As shown in fig. 1, a multicore shielded cable, the cable include many insulation core 1, internal shield 2, band 3, internal insulation layer 4, external shield 5, external insulation layer 6, fire prevention insulating layer 7, elastic layer 8, waterproof layer 9, double-deck sheath 10, evenly distributed has insulation core 1 in the internal shield 2, internal shield 2 crowded package outward constitutes the insulated cable core around band 3, internal shield 2 is the elastic shielding material, band 3 has set gradually internal insulation layer 4 from inside to outside, external shield 5, external insulation layer 6, fire prevention insulating layer 7, elastic layer 8, waterproof layer 9, double-deck sheath 10.

In order to improve the electromagnetic field generated by the unsmooth surface of the conductor 11 and prevent the partial discharge phenomenon between the conductor 11 and the insulating layer 13, the insulated wire core 1 comprises the conductor 11, an inner shielding layer 12 and the insulating layer 13, wherein the inner shielding layer 12 is arranged outside the conductor 11, and the insulating layer 13 is arranged outside the inner shielding layer 12. The insulating layer 13 can be made of ceramic fiber cotton as a heat insulation material, which not only has good insulating effect, but also has high temperature resistance and good flexibility.

In order to improve the flexibility, oxidation resistance and bearing capacity of the insulated wire core 1, the conductor 11 is formed by twisting a plurality of galvanized soft copper wires, the diameter of each single wire is less than or equal to 0.03mm, a metal plated layer can be gold plated, silver plated and the like, but the corresponding cost is increased, the inner shielding layer 12 is a rubber layer, and the insulating layer 13 is silicon rubber with the extrusion coating thickness of 0.4-4 mm.

In order to enhance the anti-interference capability of the cable to external signals and simultaneously weaken the interference condition among the wire cores, the relative positions among the wire cores are fixed, and the external impact load is relieved, and the inner shielding body 2 is made of rubber or conductive foam electromagnetic shielding material.

In order to improve the anti-interference capability of the cable, the outer shielding layer 5 is a metal mesh which is woven by iron-nickel alloy and has the density of 90%.

In order to improve the fireproof and heat-resistant capability of the cable and ensure the safe use of the cable in accidents and natural disasters, the fireproof heat-insulating layer 7 arranged in the cable can be made of high silica fiber.

In order to enhance the anti-extrusion capacity of the cable, the elastic layer 8 is an elastic strip which is uniformly arranged in the circumferential direction, two ends of the elastic strip are fixedly connected with the fireproof heat-insulating layer 7 and the waterproof layer 9 respectively, and the elastic strip can be made of silicon PU material.

In order to ensure the use safety of the cable in a water environment and prevent the oxidation of water on all parts of the cable, the waterproof layer 9 is arranged outside the elastic layer 8, and because of the superior performance of the nylon material, the nylon has the advantages of waterproofness, wear resistance, weather resistance, easy cleaning, high strength, heat resistance, cold resistance, high melting point and the like, and can be selected as the waterproof material.

In order to reduce the abrasion of the cable, enhance the vibration resistance of the cable and prolong the service life of the cable, the double-layer sheath 10 comprises an inner-layer sheath 14 and an outer-layer sheath 15, a strip-shaped groove is arranged on the outer surface of the inner-layer sheath 14, a semicircular elastic protruding key is arranged on the inner surface of the outer-layer sheath 15, a sawtooth-shaped protruding key is arranged on the outer surface of the outer-layer sheath 15, the double-layer sheath 10 can be assembled, and the double-layer sheath 10 can be made of two different types of elastic.

Claims

1. A shielded multiconductor cable, comprising: the cable include many insulation core (1), internal shield (2), band (3), internal insulation layer (4), outer shielding layer (5), external insulation layer (6), fire prevention insulating layer (7), elastic layer (8), waterproof layer (9), double-deck sheath (10), evenly distributed has in the internal shield (2) insulation core (1), the crowded parcel of internal shield (2) is outward band (3) constitutes the insulated cable core, internal shield (2) are the elastic shielding material, band (3) has set gradually from inside to outside internal insulation layer (4) external shielding layer (5) external insulation layer (6) fire prevention insulating layer (7) elastic layer (8) waterproof layer (9) double-deck sheath (10).

2. The shielded electrical multiconductor cable of claim 1, wherein: the insulation wire core (1) comprises a conductor (11), an inner shielding layer (12) and an insulation layer (13), wherein the inner shielding layer (12) is arranged outside the conductor (11), and the insulation layer (13) is arranged outside the inner shielding layer (12).

3. The shielded electrical multiconductor cable of claim 2, wherein: the conductor (11) is formed by stranding a plurality of metal-plated soft copper wires, the diameter of each single wire is less than or equal to 0.03mm, the inner shielding layer (12) is a rubber layer, and the insulating layer (13) is silicon rubber with the extrusion coating thickness of 0.4-4 mm.

4. The shielded electrical multiconductor cable of claim 1, wherein: the outer shielding layer (5) is a metal net which is woven by iron-nickel alloy and has the density of more than or equal to 85 percent.

5. The shielded electrical multiconductor cable of claim 1, wherein: the elastic layer (8) is an elastic strip which is uniformly arranged in the circumferential direction, and two ends of the elastic strip are fixedly connected with the fireproof heat-insulating layer (7) and the waterproof layer (9) respectively.

6. The shielded electrical multiconductor cable of claim 1, wherein: the double-layer sheath (10) comprises an inner layer sheath (14) and an outer layer sheath (15), the outer surface of the inner layer sheath (14) is provided with a strip-shaped groove, the inner surface of the outer layer sheath (15) is provided with a semicircular elastic convex key, the outer surface of the outer layer sheath (15) is provided with a sawtooth-shaped convex key, and the double-layer sheath (10) can be assembled.