CN202632858U - Crosslinked polyethylene insulated power cable - Google Patents

Abstract

The utility model discloses a cross-linked polyethylene insulated power cable, which comprises a conductor, an insulating layer, a filling layer, a tape layer and an outer protective layer, the conductor is arranged at the center of the cable, and the insulating layer is tightly packed On the outer layer of the conductor, the insulating layer is covered with a tape layer, a filling layer is provided between the insulating layer and the tape layer, and the outer sheath is arranged on the outermost part of the cable. layer; wherein, an armor layer of non-magnetic material is provided between the tape layer and the outer sheath layer. The utility model has the characteristics of reasonable structure, novel appearance, excellent performance and low cost, can bear relatively large current, and better meet the power transmission requirement of 0.6/1KW.

Description

A kind of XLPE insulated power cable

technical field

The utility model relates to the field of cables, in particular to a cross-linked polyethylene insulated power cable.

Background technique

Power cables are divided into several types according to the scope of use, structural characteristics and performance requirements. PVC insulated power cables are often laid in urban underground power grids, outgoing lines of power stations, internal power supply for industrial and mining enterprises, and underwater crossing rivers and seas. power lines. Due to its own structure, the existing ordinary PVC insulated power cables have the problem of being easily burned and damaged due to long-term working temperature, which is generally limited to below 70°C, which restricts the power of the power cable and affects the its scope of application.

Utility model content

The technical problem mainly solved by the utility model is to provide a cross-linked polyethylene insulated power cable with simple structure, good flame retardant effect, and long-term work in high temperature environment.

In order to solve the above technical problems, a technical solution adopted by the utility model is to provide a cross-linked polyethylene insulated power cable, the cross-linked polyethylene insulated power cable includes a conductor, an insulating layer, a filling layer, a tape layer and an outer Sheath, the conductor is arranged at the center of the cable, the insulation layer is tightly extruded on the outer layer of the conductor, the insulation layer is covered with a tape layer, and the insulation layer and the tape A filling layer is arranged between the layers, and the outer sheath is arranged on the outermost layer of the cable; wherein, a non-magnetic material armor layer is arranged between the cladding layer and the outer sheath.

Wherein, the conductor is a steel-cored aluminum stranded wire, a copper-cored aluminum stranded wire, or an aluminum alloy cored stranded wire.

Wherein, the cross section of the conductor is circular.

Wherein, the number of the conductors is five.

Wherein, the insulating layer is extruded from cross-linked polyethylene material. the

Wherein, the cross-linked polyethylene material of the insulating layer adopts one-step silane cross-linked polyethylene, and the cross-linking agent is liquid silane.

Wherein, the outer protective layer is extruded from 90°C polyvinyl chloride material, and its performance index meets the GB2952 standard.

Wherein, the material of the non-magnetic material armor layer is steel strip.

The beneficial effects of the utility model are: different from the polyvinyl chloride insulated power cable of the prior art, the cross-linked polyethylene insulated power cable of the utility model is provided with a flame-retardant wrapping layer between the insulating layer and the outer sheath , when the cable catches fire, the cladding layer forms a heat-insulating and oxygen-resistant carbonized layer to protect the cable. At the same time, the utility model is equipped with a steel tape armor layer and a 90°C polyvinyl chloride outer sheath, which not only has good mechanical properties , but also has a certain non-flammability, which not only protects the internal components of the cable, but also has the dual effect of flame retardancy. The utility model has the characteristics of reasonable structure, stable transmission performance and low cost, can bear relatively large current, and satisfies the power transmission requirement of 0.6/1KW better.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of a cross-linked polyethylene insulated power cable of the present invention.

Detailed ways

The utility model is described in detail below in conjunction with accompanying drawing and embodiment.

Please refer to Figure 1. The utility model provides a cross-linked polyethylene insulated power cable. The cross-linked polyethylene insulated power cable includes a conductor 1, an insulating layer 2, a tape layer 3, a filling layer 4 and an outer sheath 5. The conductor 1 Located in the center of the cable, the cross section of the conductor 1 is circular, and the conductor 1 is a steel-cored aluminum stranded wire, or a copper-cored aluminum stranded wire, or an aluminum alloy cored stranded wire. The insulating layer 2 is tightly packed on the outer layer of the conductor 1 , and the number of the conductors 1 is five, which are evenly distributed in the insulating layer 2 . Wherein, the insulating layer 2 is extruded from cross-linked polyethylene material, the cross-linked polyethylene material adopts one-step silane cross-linked polyethylene, and the cross-linking agent is liquid silane. The insulating layer 2 is covered with a tape layer 3, a filling layer 4 is provided between the insulating layer 2 and the tape layer 3, and an outer sheath 5 is arranged on the outermost layer of the cable, wherein the outer sheath 5 is made of 90°C polymer It is made of vinyl chloride material, and its performance index meets the GB2952 standard. A non-magnetic material armor layer 6 is arranged between the cladding layer 3 and the outer sheath layer 5, and the material of the non-magnetic material armor layer 6 is steel belt.

As shown in Figure 1, when the cross-linked polyethylene insulated power cable of the present invention is produced, firstly, the conductor 1 is made by stranding according to the requirements of different tensile strengths of the insulated conductors in electric power engineering. Specifically, in this embodiment, Conductor 1 is made of aluminum core aluminum stranded wire through rewinding and twisting to make aluminum core conductive wire core, and then adopt 0+3 type chemical cross-linking unit, which is a common equipment in the cable industry, to use the common process of cable - silane cross-linking process to cross the silane cross-linking process. The linked polyethylene is extruded on the cylindrical surface of the conductor 1 at one time, so as to form the insulating layer 2 . Then set a layer of tape layer 3 on the outer surface of the insulating layer 2, wherein the tape layer 3 can be made of mica tape or non-woven fabric material, and then filled with polypropylene tearing rope, which is extruded on the insulating layer through a cable forming process A filling layer 4 is formed between the wrapping layer and the tape layer. A layer of non-magnetic material armor layer 6 will be arranged on the outer surface of the cladding layer 3. In this embodiment, the non-magnetic material is a steel strip. The steel tape armor layer 6 enables the cable to withstand mechanical external forces. Finally, an outer sheath 5 is provided on the surface of the steel tape armor layer 6. The outer sheath 5 is extruded from polyvinyl chloride, and its performance index meets the GB2952 standard.

Since the cross-linked polyethylene insulated power cable of the utility model uses cross-linked polyethylene insulation, compared with traditional polyvinyl chloride insulation, cross-linked polyethylene has a higher working temperature and short-circuit temperature, and a longer weather-resistant aging life , It also has better mechanical resistance. At the same time, the volume resistivity of cross-linked polyethylene is relatively high, the dielectric constant is small, the electrical performance is good, and the insulation effect is good. When the cable catches fire, the mica tape in the tape layer 3 forms a heat-insulating and oxygen-resistant carbonized layer to protect the cable, thereby preventing the flame from spreading and burning along the cable. When the surrounding area catches fire, the tape layer 3 can protect the cable from being damaged within a certain period of time and ensure the normal operation of the electric power. In addition, the outer sheath 5 is made of 90°C polyvinyl chloride material, which not only has good mechanical properties, but also has a certain non-flammability, which not only protects the internal components of the cable, but also has the dual effect of flame retardancy.

Compared with the overhead insulated cables in the prior art, the utility model has the characteristics of reasonable structure, novel appearance, excellent performance and low cost, can withstand larger current, and better meet the power transmission requirements of 0.6/1KW.

The above is only an embodiment of the utility model, and does not limit the patent scope of the utility model. Any equivalent structure or equivalent process conversion made by using the utility model specification and accompanying drawings, or directly or indirectly used in other Related technical fields are all included in the patent protection scope of the present utility model in the same way.

Claims (8)

1. power cable with cross-linked polyethylene insulation; It is characterized in that said power cable with cross-linked polyethylene insulation comprises conductor, insulating barrier, packed layer, belting layer and outer jacket, said conductor is located at the center of said cable; Said insulating barrier closely is extruded in the skin of said conductor; Said insulating barrier is coated with belting layer, is provided with packed layer between said insulating barrier and the said belting layer, and said outer jacket is located at the outermost layer of said cable; Wherein, be provided with the non-magnetic material armour between said belting layer and the said outer jacket.

2. power cable with cross-linked polyethylene insulation according to claim 1 is characterized in that, said conductor is steel reinforced aluminium conductor or copper core aluminum stranded wire or aluminium alloy core twisted wire.

3. power cable with cross-linked polyethylene insulation according to claim 2 is characterized in that, the cross section of said conductor is circular.

4. power cable with cross-linked polyethylene insulation according to claim 3 is characterized in that, the quantity of said conductor is five.

5. power cable with cross-linked polyethylene insulation according to claim 1 is characterized in that, said insulating barrier adopts cross-linking polyethylene materials to extrude and forms.

6. power cable with cross-linked polyethylene insulation according to claim 5 is characterized in that, the cross-linking polyethylene materials of said insulating barrier adopts one-step silane cross-linked polyethylene, and crosslinking agent is a liquid silane.

7. power cable with cross-linked polyethylene insulation according to claim 1 is characterized in that, said outer jacket adopts 90 ℃ of pvc materials to extrude and forms.

8. power cable with cross-linked polyethylene insulation according to claim 1 is characterized in that, the material of said non-magnetic material armour is a steel band.

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