CN203102986U - Rated voltage 6 to 15kV silicone rubber insulated power flexible cable - Google Patents

Abstract

The utility model discloses a silicon rubber insulated flexible power cable with a rated voltage of 6 to 15kV, which comprises three copper conductors twisted by a plurality of tinned copper wires or bare copper wires, and the outer surface of the copper conductors is covered with a first half Conductive silicone rubber layer, a silicone rubber insulating layer coated on the outer surface of the first semiconductive silicone rubber layer, a second semiconductive silicone rubber layer coated on the outer surface of the silicone rubber insulating layer to form a power core, Three such power cores are twisted to form a cable core, and a cushion layer covers the outer surface of the cable core, and the outer surface of the cushion layer is covered with a sheath layer, and the inner sheath layer and the outer sheath layer of the sheath layer There is a braided reinforcing layer in between. The utility model can not only suppress the emission of electromagnetic waves, but also serve as a channel for short-circuit current and protect the neutral wire core, thereby ensuring long-term safe and stable operation of the cable.

Description

Rated voltage 6 to 15kV silicone rubber insulated power flexible cable

technical field

The utility model relates to a silicon rubber insulated flexible power cable, in particular to a silicon rubber insulated flexible power cable with a rated voltage of 6 to 15kV.

Background technique

Insulated inverter cables in the prior art are suitable for special fields such as iron and steel, metallurgy, and oil exploration, where the working environment is harsh and the temperature is high. When using long-distance cables to connect inverters and motors installed in different locations, the motor power is relatively large. The frequency spectrum band is wide. For the electric transmission system such as the inverter-cable-motor, the distribution characteristics and length of the cable become the main factors affecting the working efficiency of the inverter. The details are as follows:

(1) Cables are often used in harsh environmental conditions, such as power generation, chemical industry, petroleum, metallurgy, steel and other special fields, requiring some of the cables used to have special properties such as high temperature resistance, acid and alkali resistance, and aging resistance.

(2) During the use of the cable, it is necessary to ensure that the cable can work normally and stably under high temperature, low temperature or more harsh environment conditions, so as to ensure the long-term safe and stable operation of the cable.

(3) The cable should not only suppress the emission of electromagnetic waves, but also serve as a channel for short-circuit current and protect the neutral core.

Therefore, considering many factors such as the use environment, voltage or current waveform distortion, electromagnetic interference, distributed capacitance, waveform impedance, etc., the existing cable structure design is analyzed to meet the requirements of the use environment, so that the entire frequency conversion system can work efficiently. To be more reliable and stable has become the direction of efforts of those of ordinary skill in the art.

Contents of the invention

The utility model provides a silicon rubber insulated power flexible cable with a rated voltage of 6 to 15kV, which can not only suppress the emission of electromagnetic waves to the outside, but also serve as a channel for short-circuit current to protect the neutral wire core, thereby ensuring Long-term safe and stable operation of the cable.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a silicon rubber insulated flexible power cable with a rated voltage of 6 to 15kV, including three copper conductors twisted by a number of tinned copper wires or bare copper wires. The outer surface of the copper conductor is coated with a first semiconductive silicone rubber layer, a silicone rubber insulating layer is coated on the outer surface of the first semiconductive silicone rubber layer, and a second semiconductive silicone rubber layer is coated on the silicone rubber The outer surface of the insulating layer forms a power core, three of these power cores are twisted to form a cable core, a cushion layer covers the outer surface of the cable core, the outer surface of the cushion layer is covered with a sheath layer, and the sheath layer A braided reinforcing layer is arranged between the middle inner sheath layer and the outer sheath layer.

The technical scheme further improved in the above-mentioned technical scheme is as follows:

1. In the above scheme, in the copper conductor formed by twisting several tinned copper wires or bare copper wires, forward and reverse twisting is adopted between adjacent layers, and the lay length of the outermost layer is not more than 12 times. The second outer layer is not more than 10 times.

2. In the above solution, the cross-sectional area of the power wire core is 32-38mm ² .

Due to the application of the above-mentioned technical solutions, the utility model has the following advantages compared with the prior art:

The utility model has a rated voltage of 6 to 15kV silicone rubber insulated power flexible cable, the power core of which includes a copper conductor, and the outer surface of the copper conductor is coated with the first semiconductive silicone rubber layer, the silicone rubber insulating layer and the first semiconductive silicon rubber in turn. The rubber layer increases the shielding surface area and reduces the shielding impedance. The shielding layer can not only suppress the emission of electromagnetic waves, but also serve as a channel for short-circuit current and protect the neutral core, thus ensuring the long-term safety of the cable. Stable operation; at the same time, it also makes the silicone rubber insulated inverter cable have good heat resistance, cold resistance, aging resistance, ozone resistance, oil resistance and other properties, which improves the performance of the cable and the life of the cable.

Description of drawings

Accompanying drawing 1 is the structural schematic diagram of the silicone rubber insulated power flexible cable of the present invention.

In the above drawings: 1. copper conductor; 2. first semiconductive silicone rubber layer; 3. silicone rubber insulating layer; 4. second semiconductive silicone rubber layer; 5. power core; 6. cable core; 7. Cushion layer; 8, sheath layer; 81, inner sheath layer; 82, outer sheath layer; 9, braided reinforcing layer.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Embodiment: A silicone rubber insulated power flexible cable with a rated voltage of 6 to 15kV, including three copper conductors 1 twisted by several tinned copper wires or bare copper wires, the outer surface of the copper conductors 1 is coated with a first Semiconductive silicone rubber layer 2, a silicone rubber insulating layer 3 coated on the outer surface of the first semiconductive silicone rubber layer 2, a second semiconductive silicone rubber layer 4 coated on the outer surface of the silicone rubber insulating layer 3 Thereby forming a power core 5, three of these power cores 5 are twisted to form a cable core 6, a cushion layer 7 is coated on the outer surface of the cable core 6, and the outer surface of the cushion layer 7 is covered with a sheath layer 8, the A braided reinforcement layer 9 is provided between the inner sheath layer 81 and the outer sheath layer 82 in the sheath layer 8 .

In the above-mentioned copper conductor 1 formed by twisting several tinned copper wires or bare copper wires, forward and reverse twisting is adopted between adjacent layers, the twist length of the outermost layer is not more than 12 times, and the second outer layer is not more than 10 times. times.

The above-mentioned power core 5 has a cross-sectional area of 32-38mm ² .

Model voltage specification: GGR 8.7/15kV 3×35+3×16/3

3-core power core 5 is 35mm ² section, power core: twisted with copper wire bundle first, then extruded semi-conductive silicone rubber shielding material + silicone rubber insulating material + semi-conductive silicone rubber shielding material; ground core: first Copper wires are paralleled and braided outside the insulating core; cable assembly: the power cores are cabled together according to a suitable pitch ratio, and semi-conductive silicone rubber material is filled in the center;

The above silicone rubber insulated inverter cables are further elaborated as follows.

1. Extrusion of semi-conductive silicone rubber

In order to meet the voltage level requirements of 6 to 15kV, high-conductivity silicone rubber material is selected as the shielding material, and a steam continuous vulcanization extruder is used to co-extrude three layers of semi-conductive silicone rubber + high-electricity silicone rubber insulating material + semi-conductive silicone rubber at the same time Extrusion improves the electric field distribution of the wire core, reduces partial discharge factors, prolongs the service life of the medium-voltage silicone rubber inverter cable, and ensures the long-term safe and stable operation of the cable.

2. The design of the cable structure of the rated voltage 6 to 15kV silicone rubber insulated frequency converter

2.1 Conductor: Material: tinned copper wire or bare copper wire;

Structure: Due to the influence of "skin effect", the surface area of the conductor should be appropriately increased when designing the inverter cable to reduce the impedance. There should be more type 2 conductors, and if possible, use type 5 soft conductors to increase the surface area and reduce the reactance.

2.2 Insulation: Insulation material: high electrical performance silicone rubber insulation material;

Performance requirements:

The temperature resistance grade must be between -60°C and 150°C, so as to ensure that the cable can work normally and stably under high temperature, low temperature or harsher environment conditions;

 良好的电气性能和优异的机械物理性能，其电绝缘性能、耐电晕性和耐电弧性非常好，介电常数虽不如交联聚乙烯理想，但是综合使用环境，如在高温、低温、有油污、有污染的环境中使用，硅橡胶材料具有特定的优势。

Good electrical properties and excellent mechanical and physical properties, its electrical insulation properties, corona resistance and arc resistance are very good, although the dielectric constant is not as ideal as cross-linked polyethylene, but the comprehensive use environment, such as high temperature, low temperature, Used in oily and polluted environments, silicone rubber materials have specific advantages.

3. Cabling

3.1 Core Stranding

The structural design of this process plays an important role in the bending performance of the cable. Generally, the pitch ratio of the cable is required to be no more than 12 times to ensure that the overall bending performance and internal stress of the cable are uniform;

3.2 Filling

The middle of the three power cores is filled with semi-conductive high-temperature resistant non-hygroscopic materials;

3.3 Sheath

Material: silicone rubber sheath material;

Performance requirements:

 耐温等级必须在-60℃～150℃之间，这样能承受高温、低温或者环境更为苛刻的条件下，电缆能够正常稳定的工作。

The temperature resistance grade must be between -60°C and 150°C, so that the cable can work normally and stably under conditions of high temperature, low temperature or harsher environment.

具备良好耐热性、耐寒性、耐老化性能、耐臭氧、耐油性能；

Good heat resistance, cold resistance, aging resistance, ozone resistance, oil resistance;

具备优良的机械物理性能。

With excellent mechanical and physical properties.

When the above-mentioned rated voltage of 6 to 15kV silicone rubber insulated power flexible cable is used, the power core includes a copper conductor, and the outer surface of the copper conductor is coated with the first semiconducting silicone rubber layer, the silicone rubber insulating layer and the first semiconducting silicon rubber layer. The rubber layer increases the shielding surface area and reduces the shielding impedance. The shielding layer can not only suppress the emission of electromagnetic waves, but also serve as a channel for short-circuit current and protect the neutral core, thus ensuring the long-term safety of the cable. Stable operation; at the same time, it also makes the silicone rubber insulated inverter cable have good heat resistance, cold resistance, aging resistance, ozone resistance, oil resistance and other properties, which improves the performance of the cable and the life of the cable.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present utility model, and its purpose is to enable those familiar with this technology to understand the content of the present utility model and implement it accordingly, and not to limit the protection scope of the present utility model. All equivalent changes or modifications made according to the spirit of the utility model shall fall within the protection scope of the utility model.

Claims (3)

1. a rated voltage 6 is to 15kV silicon rubber insulation flexible electric power cable, it is characterized in that: comprise three by some tinned copper wires or the stranded copper conductor that forms of bare copper wire (1), described copper conductor (1) outer surface is coated with the first semiconductive silastic-layer (2), one silicone rubber insulation layer (3) is coated on described first semiconductive silastic-layer (2) outer surface, one second semiconductive silastic-layer (4) is coated on described silicone rubber insulation layer (3) thereby outer surface forms power core (5), three these stranded formation cable cores of power core (5) (6), one bed course (7) is coated on this cable core (6) outer surface, this bed course (7) outer surface is coated with restrictive coating (8), is provided with braiding reinforced layer (9) in this restrictive coating (8) between inner restrictive coating (81) and the external sheath layer (82).

2. silicon rubber insulation flexible electric power cable according to claim 1, it is characterized in that: described forward and reverse stranded by adopting between adjacent layer in some tinned copper wires or the stranded copper conductor that forms of bare copper wire (1) and the layer, the outermost layer lay is not more than 12 times, and inferior skin is not more than 10 times.

3. silicon rubber insulation flexible electric power cable according to claim 1 is characterized in that: the sectional area of described power core (5) is 32 ~ 38mm ²

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