Composite twisted copper conductive wire core and copper core medium-voltage power cable

Abstract

The invention belongs to the technical field of cable materials, and particularly relates to a composite twisted copper conductive wire core and a copper core medium-voltage power cable. The conductive wire core is formed by compounding the inner-layer copper conductor and the outer-layer copper conductor, the inner-layer copper conductor is formed by twisting the round copper single wires, the outer-layer copper conductor is formed by twisting the special-shaped copper single wires, the round single wires and the special-shaped single wires are compounded and twisted to form the copper conductor, and the purposes of cost reduction and improvement are achieved. The conductive wire core does not have a cold deformation process, so that the problem that the direct-current resistance of the conductor is increased due to work hardening is avoided, the cross section of the conductor can be reduced by about 1%-2% under the condition that the same direct-current resistance of the conductor is achieved, and the purpose of saving cost is achieved. According to the conductive wire core, the purpose of expanding the diameter is achieved through non-compression twisting of the inner layer, so that the outer diameter of the conductor is basically consistent with the outer diameter of the second kind of compression circular copper conductor, and cable accessories and fittings for cable installation and matching can be completely matched with the conductor for use.

Description

technical field

[0001] The invention belongs to the technical field of cable materials, and in particular relates to a composite stranded copper conductive wire core and a copper core medium voltage power cable. Background technique

[0002] Materials are a key element in the development of wire and cable products, and the development of wire and cable technology and product updates must be based on materials. The copper material used in the cable conductor is the main material of the cable, which occupies a large proportion in the cost of the cable.

[0003] According to the provisions of GB / T 12706, medium voltage XLPE insulated power cables should have conductor shielding and insulating shielding inside and outside the insulation layer. The main function of conductor shielding is to uniform the electric field on the surface of the conductor and prevent partial discharge caused by gaps between the conductor and the insulating layer. , the main function of insulation shiel...

Examples

Embodiment 1

[0051] like image 3 As shown in the figure, a composite stranded copper conductor core, and the structure is composed of 7 or 19 or 37 round copper single wires twisted into a non-compressed inner layer copper conductor 1-1 and an appropriate number of layers 1-4. The outer layers of the T-type copper single wire 1-2 are twisted together. The number of layers and the number of 1-1 and 1-2 are determined according to different conductor cross-sections. The inner layer copper conductor and the outer layer copper conductor are non- Squeeze the structure. According to the nominal cross-sectional area of ​​different conductors, the inner layer copper conductor consists of 7, 19 or 37 circular annealed copper single wires of equal outer diameter. According to the nominal cross-sectional area of ​​different conductors, the outer layer copper conductors are composed of 1-4 layers of special-shaped annealed copper single wires with an appropriate number. The difference between the o...

Embodiment 2

[0065] like Figure 4 As shown in the figure, a medium-voltage power cable with copper core is composed of 1-1 and 1-2 to form a conductive core; 2, 3, and 4 are extruded and formed by three-layer co-extrusion technology, and the semi-conductive insulating shielding layer is extruded and wrapped around the outside. The shielding layer 5 of the copper-clad tape constitutes the cable core; 3 identical cable cores are twisted into a cable, rounded by the filling material 6, and the cabled core is fastened by the wrapping tape 7; a layer of isolation is extruded outside the cabled core Sleeve 8; outside the isolation sleeve 8, it is wrapped through the gap of double-layer galvanized steel tape, and the gap ratio is not more than 50%, forming a steel tape armor layer 9; a layer of outer sheath is extruded outside the steel tape armor layer; 6 , 7, 8, 10 material types are determined according to different cable models.

technical field

[0001] The invention belongs to the technical field of cable materials, and in particular relates to a composite stranded copper conductive wire core and a copper core medium voltage power cable. Background technique

[0002] Materials are a key element in the development of wire and cable products, and the development of wire and cable technology and product updates must be based on materials. The copper material used in the cable conductor is the main material of the cable, which occupies a large proportion in the cost of the cable.

[0003] According to the provisions of GB / T 12706, medium voltage XLPE insulated power cables should have conductor shielding and insulating shielding inside and outside the insulation layer. The main function of conductor shielding is to uniform the electric field on the surface of the conductor and prevent partial discharge caused by gaps between the conductor and the insulating layer. , the main function of insulation shiel...

Examples

Embodiment 1

[0051] like image 3 As shown in the figure, a composite stranded copper conductor core, and the structure is composed of 7 or 19 or 37 round copper single wires twisted into a non-compressed inner layer copper conductor 1-1 and an appropriate number of layers 1-4. The outer layers of the T-type copper single wire 1-2 are twisted together. The number of layers and the number of 1-1 and 1-2 are determined according to different conductor cross-sections. The inner layer copper conductor and the outer layer copper conductor are non- Squeeze the structure. According to the nominal cross-sectional area of ​​different conductors, the inner layer copper conductor consists of 7, 19 or 37 circular annealed copper single wires of equal outer diameter. According to the nominal cross-sectional area of ​​different conductors, the outer layer copper conductors are composed of 1-4 layers of special-shaped annealed copper single wires with an appropriate number. The difference between the o...

Embodiment 2

[0065] like Figure 4 As shown in the figure, a medium-voltage power cable with copper core is composed of 1-1 and 1-2 to form a conductive core; 2, 3, and 4 are extruded and formed by three-layer co-extrusion technology, and the semi-conductive insulating shielding layer is extruded and wrapped around the outside. The shielding layer 5 of the copper-clad tape constitutes the cable core; 3 identical cable cores are twisted into a cable, rounded by the filling material 6, and the cabled core is fastened by the wrapping tape 7; a layer of isolation is extruded outside the cabled core Sleeve 8; outside the isolation sleeve 8, it is wrapped through the gap of double-layer galvanized steel tape, and the gap ratio is not more than 50%, forming a steel tape armor layer 9; a layer of outer sheath is extruded outside the steel tape armor layer; 6 , 7, 8, 10 material types are determined according to different cable models.

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