CN218647663U

CN218647663U - Multi-core control cable for power system

Info

Publication number: CN218647663U
Application number: CN202223211192.XU
Authority: CN
Inventors: 邱伟宏; 谢利英; 邱伟雄
Original assignee: Guangdong Shanhu Cable Co ltd
Current assignee: Guangdong Shanhu Cable Co ltd
Priority date: 2022-12-01
Filing date: 2022-12-01
Publication date: 2023-03-17
Anticipated expiration: 2032-12-01

Abstract

The utility model discloses a multi-core control cable for an electric power system, which comprises a composite cable core and a sheath structure which are arranged from inside to outside in sequence; the composite cable core comprises a first reinforced core positioned in the center and 5 cables arranged around the first reinforced core; the cable comprises a second reinforcing core, 5 insulated conductors and a wrapping tape layer, wherein the second reinforcing core, the 5 insulated conductors and the wrapping tape layer are sequentially arranged from inside to outside. The utility model discloses an optimize the cabling structure, adopt the secondary cabling structure of cable and compound cable core, the unbalanced condition of insulation core atress has been avoided to cabling structure optimization back cable. The cabling structure of the technology enables the stress of the insulated wire core to be balanced, effectively improves the torsion resistance of the whole cable, prolongs the service life of the cable, and improves the safety of the cable in the using process.

Description

Multi-core control cable for power system

Technical Field

The utility model belongs to the technical field of wire and cable, concretely relates to multicore control cable that electric power system used.

Background

The multi-core control cable for the offshore wind power system is mainly used for a wind power control cabinet connecting system and is installed on wind power equipment. In order to meet the use requirements of severe environments, the offshore wind energy control cable should have the performances of flame retardance, low smoke, zero halogen, oil resistance, ozone resistance, torsion resistance and the like, wherein the torsion resistance is the most important performance index of the cable for the wind energy power system. The reason is that in the use process, the wind turbine tower barrel is twisted and axially displaced, and after the wind turbine tower barrel is used for a certain time, the cable is easy to break a wire core, so that the whole offshore wind power equipment cannot normally operate, and immeasurable loss is caused.

The Chinese utility model patent with the publication number of CN217386730U discloses a novel torsion-resistant and cold-resistant wind energy safety chain cable, which comprises insulating core wires, a cabling center reinforcing unit and an outer sheath, wherein a plurality of insulating core wires are twisted in the same direction by taking the cabling center reinforcing unit as a center to form a cable core, and the periphery of the cable core is wrapped by the outer sheath; the insulating core wire comprises a spring-shaped conductor, and an isolating layer, an insulating layer and a self-adhesive insulating tape which are sequentially wrapped on the periphery of the spring-shaped conductor, wherein the spring-shaped conductor comprises a conductor center force bearing unit and a conductive copper wire tightly wound on the periphery of the conductor center force bearing unit. The cable cabling central reinforcing unit and the conductor central force bearing units of all the insulation core wires bear tension, the spring-shaped conductors are longitudinally wrapped with the isolation layers, and the spring-shaped conductors can be axially bent, so that the spring-shaped conductors are prevented from being broken due to tension or torsion. The insulating layer of insulating heart yearn wraps the self-adhesion insulating tape outward, avoids the insulating layer to twist reverse the in-process fracture.

As shown in FIG. 1, in the cabling structure of 1+6+12 layered stranding adopted by the existing cable, the stress of the insulated wire cores of the cabling structure is not evenly distributed, that is, the horizontal acting force and the mutual extrusion force applied to each insulated wire core are not balanced, the layered stranding structure causes inconsistent stress, and the inner layer wire core is extruded by the outer layer wire core and is easy to break in the twisting process.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve foretell technical problem, provide a multicore control cable that electric power system used.

In order to solve the above problem, the utility model discloses realize according to following technical scheme:

the utility model provides a multi-core control cable for an electric power system, which comprises a composite cable core and a sheath structure which are arranged from inside to outside in sequence;

the composite cable core comprises a first reinforced core positioned in the center and 5 cables arranged around the first reinforced core;

the cable comprises a second reinforcing core, 5 insulated conductors and a wrapping tape layer, wherein the second reinforcing core, the 5 insulated conductors and the wrapping tape layer are sequentially arranged from inside to outside.

Preferably, the first and second strength cores are identical in structure, and the second strength core has a smaller outer diameter than the first strength core;

the first reinforcing core comprises a solid strip and a bulletproof wire braid layer wrapping the solid strip;

preferably, the solid strip is a steel wire rope.

Preferably, a filler rope is provided in the gap between the first reinforcing core of the composite cable core and the cable,

a rope is filled in the gaps between the insulated conductors of the cable.

Preferably, the sheath structure includes by interior from the first covering that sets gradually outward, metallic braid, second around covering and oversheath.

Preferably, the metal braided layer is formed by weaving stainless steel wires, and the weaving density of the metal braided layer is not less than 90%.

Preferably, the wrapping tape layer, the first wrapping layer and the second wrapping layer adopt one of a water-blocking tape, a calcined mica tape and a ceramic silicon rubber wrapping tape.

Preferably, the outer sheath is a black wear-resistant nylon sheath.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model adopts a multi-core control cable for an electric power system, which comprises a composite cable core and a sheath structure which are arranged from inside to outside in sequence; the composite cable core comprises a first reinforced core positioned in the center and 5 cables arranged around the first reinforced core; the cable comprises a second reinforcing core, 5 insulated conductors and a wrapping tape layer, wherein the second reinforcing core, the 5 insulated conductors and the wrapping tape layer are sequentially arranged from inside to outside.

The utility model discloses an optimize the cabling structure, adopt the secondary cabling structure of cable and compound cable core, the unbalanced condition of insulation core atress has been avoided to cabling structure optimization back cable. The cabling structure of the technology enables the stress of the insulated wire core to be balanced, effectively improves the torsion resistance of the whole cable, prolongs the service life of the cable, and improves the safety of the cable in the using process.

Drawings

The following detailed description of embodiments of the invention is provided with reference to the accompanying drawings, in which:

fig. 1 is a schematic cross-sectional view of a prior art cable of the present invention;

fig. 2 is a schematic cable cross-sectional view of a multi-core control cable for an electric power system according to the present invention;

in the figure:

10-a first reinforcing core;

20-a cable;

30-a second reinforcing core;

40-an insulated conductor;

50-sheath structure.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

As shown in fig. 2, the present invention provides a preferred structure of a multi-core control cable for an electric power system.

As shown in fig. 2, the multi-core control cable for the power system includes a composite cable core and sheath structure 50 arranged from inside to outside in sequence; the composite cable core comprises a first reinforced core 10 positioned in the center and 5 cables 20 arranged around the first reinforced core; the cable comprises a second reinforced core 30, 5 insulated conductors 40 and a wrapping tape layer, wherein the second reinforced core and the insulated conductors are sequentially arranged from inside to outside and surround the second reinforced core.

The existing cable adopts a cabling structure of 1+6+12 layered stranding, the stress of the insulated wire cores of the cabling structure is not evenly shared, namely the horizontal acting force and the mutual extrusion force of each insulated wire core are unbalanced, the layered stranding structure causes inconsistent stress, and the inner wire core is extruded by the outer wire core and is easy to break in the twisting process. Therefore, the utility model discloses optimize cable construction, this cabling structural design can make the horizontal effort that every cable received and interact's extrusion force average distribution, and the effort is balanced, and the power of acting on every insulated conductor is also unanimous, and the horizontal effort that every insulated conductor received is the same basically promptly, avoids insulated conductor to take place the twist-off because of the atress is uneven.

In one implementation, the first and second strength cores are identical in structure, and the second strength core has a smaller outer diameter than the first strength core; the first reinforcing core comprises a solid strip and a bulletproof wire braid layer wrapping the solid strip; the second reinforcing core comprises a solid strip and a bulletproof wire braid layer wrapping the solid strip.

In a preferred implementation, the solid strip is a steel cord.

In one implementation, a filler cord is disposed in the gap between the first strength core of the composite cable core and the cable, and a filler cord is disposed in the gap between the insulated conductors of the cable. In order to guarantee the cable round needs, the filling rope can adopt glass fiber rope, cotton thread etc..

In a concrete implementation, the sheath structure includes by interior from the first wrapping layer that sets gradually outward, metallic braid, second wrapping layer and oversheath.

In one implementation, the insulated conductor comprises a conductor and an insulating layer, and the insulating layer is wrapped on the conductor by a polyether-ether-ketone material or an alternating current polyvinyl chloride material. Polyether ether ketone (PEEK) is adopted, and the continuous use temperature is 260 ℃, wherein the PEEK has higher melting point (334 ℃) and glass transition temperature (143 ℃); the cable is used for manufacturing the inner sheath and can meet the use requirement of the cable in a high-temperature environment. The polyether-ether-ketone has self-extinguishing property, and can reach 94V-0 grade of UL standard and the optimal grade of flame retardance even if no flame retardant is added. The control cable has certain flame retardant property.

In a preferred implementation, the metal woven layer is woven by stainless steel wires, and the weaving density of the metal woven layer is not less than 90%. The metal braiding layer is an armor layer woven by metal wires, and the metal braiding layer has good elasticity after being woven, so that the compression resistance and the tensile resistance of the control cable can be improved to a certain extent.

In one specific implementation, the wrapping tape layer, the first wrapping layer and the second wrapping layer adopt one of a water-blocking tape, a calcined mica tape and a ceramic silicon rubber wrapping tape. Taping is a routine technique in the art and is not overly elaborated.

In a preferred implementation, the outer sheath is a black abrasion-resistant nylon sheath. The black high wear-resistant nylon sheath has a lower friction coefficient, a higher PV value, better friction and wear resistance and better self-lubricating property compared with pure nylon resin. The wear-resistant nylon has more excellent wear resistance, heat resistance, oil resistance and corrosion resistance, greatly reduces the water absorption rate and shrinkage rate of raw materials, has excellent dimensional stability and excellent strength, has longer service life and is more suitable for severe environments.

Other structures of the multi-core control cable for the power system described in the present embodiment are referred to in the prior art.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made by the technical spirit of the present invention to the above embodiments do not depart from the technical solution of the present invention, and still fall within the scope of the technical solution of the present invention.

Claims

1. A multi-core control cable for an electric power system is characterized by comprising a composite cable core and a sheath structure which are sequentially arranged from inside to outside;

2. A multi-conductor control cable for an electric power system as claimed in claim 1, wherein:

the first reinforcing core and the second reinforcing core have the same structure, and the outer diameter of the second reinforcing core is smaller than that of the first reinforcing core;

the first reinforcing core comprises a solid strip and a bulletproof wire braid layer wrapping the solid strip.

3. A multi-conductor control cable for an electric power system as claimed in claim 2, wherein:

the solid strip is a steel wire rope.

4. A multi-conductor control cable for an electric power system as claimed in claim 1, wherein:

a filling rope is arranged in a gap between the first reinforced core and the cable of the composite cable core,

a cord is filled in the gaps between the insulated conductors of the cable.

5. The multi-core control cable for the power system as claimed in claim 1, wherein the sheath structure comprises a first wrapping layer, a metal braid layer, a second wrapping layer and an outer sheath, which are sequentially arranged from inside to outside.

6. A multi-conductor control cable for an electric power system as claimed in claim 5, wherein:

the metal braided layer is formed by weaving stainless steel wires, and the weaving density of the metal braided layer is not less than 90%.

7. A multi-conductor control cable for an electric power system as claimed in claim 5, wherein:

the wrapping tape layer, the first wrapping layer and the second wrapping layer are made of one of a water blocking tape, a calcined mica tape and a ceramic silicon rubber wrapping tape.

8. A multicore control cable for an electrical power system, in accordance with claim 5, wherein:

the outer sheath is made of black wear-resistant nylon.