CN209822329U

CN209822329U - Balanced suspension type overhead insulated cable

Info

Publication number: CN209822329U
Application number: CN201920937796.1U
Authority: CN
Inventors: 张立阳; 付秋平; 刘顺荣; 吴勇; 石海
Original assignee: Jiangsu Baoan Cable Co Ltd
Current assignee: Jiangsu Bao'an Cable Co ltd
Priority date: 2019-06-21
Filing date: 2019-06-21
Publication date: 2019-12-20
Anticipated expiration: 2029-06-21

Abstract

The utility model relates to a balanced suspension type aerial insulated cable, it includes conductive element and lower conductive element, and they pass through the oversheath and connect, it includes bearing structure to go up conductive element the bearing structure outside is equipped with conductor I outside conductor I is equipped with insulating layer I and insulating barrier I in proper order, and their bilayer is crowded altogether forms, down conductive element includes a plurality of conductive subelements down, and they are circumscribed parallel arrangement, conductive subelement includes conductor II down II outside conductor II is equipped with insulating layer II and insulating barrier II in proper order, and their bilayer is crowded altogether and is formed. The utility model discloses cable weight reasonable dispersion, the tensile structure of bearing frame line and transmission current's conductor rational design, cable laying are in aerial balance atress, steady operation.

Description

Balanced suspension type overhead insulated cable

Technical Field

The utility model relates to a cable, concretely relates to overhead insulated cable of middling pressure three-core.

Background

Medium voltage overhead insulated cables are typically provided with steel structures to withstand the stringing tension. When the cable is a three-core structure, the position of the steel structure is very important for keeping balance, and meanwhile, the cable is erected in the air, and the gravity and possible shaking of the cable need to be considered. The common steel structure is placed at the upper end of the three-core structure and bound with the three insulated wire cores. The cable of this structure has uneven weight distribution and is likely to shake. And the overall structure of the cable is tightened by the binding belt, and the binding belt is stressed and easy to loosen in the actual laying operation process.

Disclosure of Invention

The purpose of the invention is as follows: the utility model aims at overcoming the not enough among the prior art, provide a reasonable dispersion of cable weight, bear the tensile structure of overhead line and transmission current's conductor rational design, the cable laying is at aerial balanced atress, the overhead insulated cable of balanced suspension type of steady operation.

The technical scheme is as follows: in order to solve the technical problem, a balanced suspension type aerial insulated cable, it includes electrically conductive unit and lower electrically conductive unit, they pass through the oversheath and connect, it includes bearing structure to go up electrically conductive unit the bearing structure outside is equipped with conductor I the I outside of conductor is equipped with insulating layer I and insulating barrier I in proper order, and their bilayer is crowded altogether and is formed, electrically conductive unit includes a plurality of electrically conductive subelements down, and they are circumscribed parallel arrangement, electrically conductive subelement includes conductor II down II the II outsides of conductor are equipped with insulating layer II and insulating barrier II in proper order, and their bilayer is crowded altogether and is formed.

The conductor I and the conductor II are both aluminum conductors, and the cross-sectional areas of the conductors I and II are equal.

The bearing structure is an aluminum-clad steel strand, and the cross-sectional area of the bearing structure is not less than 25mm²。

The number of the lower conductive subunits is two.

And the insulating layer I and the insulating layer II are both crosslinked polyethylene layers, wherein the thickness of the insulating layer II is not less than 2.5 mm.

The insulating shielding layer I and the insulating shielding layer II are semi-conducting layers, and the thicknesses of the insulating shielding layers I and the insulating shielding layers II are 0.6-0.8 mm.

The outer sheath integrally connects the upper conductive unit and the lower conductive unit, the middle of the outer sheath is in a connecting rib shape, the upper part of the outer sheath is tightly extruded outside the upper conductive unit, the lower part of the outer sheath is extruded outside the lower conductive unit, the upper part and the lower part of the outer sheath are both circular, and the thickness of the outer sheath is not less than 1.6 mm.

Has the advantages that: compared with the prior art, the utility model, it is showing the advantage and is: the utility model has the advantages of reasonable overall structure setting, two parts about the cable is whole to be divided into, balanced cable weight, make the cable be difficult to rock laying with the operation in-process, cable upper portion is the tensile aluminium conductor that twists outside the aluminium package steel construction of bearing frame line, wherein bearing structure's cross-section mainly erects the pulling force decision that receives on the tower pole according to the cable, consider two parts weight distribution reduction cable about the cable simultaneously and rock aloft, can adjust according to aluminium conductor's cross-section and weight, the cross-sectional value is not less than 25mm²The lower part is two aluminum wire cores, the cross section of the aluminum wire core conductor is consistent with that of the aluminum conductor of the upper part, the two aluminum conductor insulated wire cores are arranged in parallel and are not twisted, the current carrying capacity is improved, the conductor I and the conductor II are both aluminum conductors, the cross sections of the conductors are equal to form three-phase transmission current, the outer layers of the conductors are twisted and tightly pressed, the smoothness of the insulated inner surface and the conductor interface is improved, the possibility of electric field concentration and local discharge in the operation process of the cable is reduced, the thickness of the insulating layer is determined according to the voltage grade of the cable and is not less than 2.5mm, the insulating shielding layer is made of a semi-conductive material and plays a role in shielding the electric field of the wire cores, the thickness is 0.6-0.8mm, the insulating layer and theThe whole sheath of upper and lower two parts crowded package, the centre is connected by the splice bar, and upper and lower two parts sheath is circularly, and the inseparable crowded package of upper portion is outside the sinle silk, and the crowded package of lower part is outside two parallel sinle silks, and the inseparable crowded package of upper portion sheath is when the sinle silk, and the atress is more stable, and lower part sheath has great space from top to bottom with two parallel sinle silks, and the heat dissipation is fast, can improve cable current-carrying capacity.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

As shown in figure 1, a balanced suspension type aerial insulated cable, it includes electrically conductive unit and lower electrically conductive unit, they pass through oversheath 1 and connect, it includes bearing structure 2 to go up electrically conductive unit, bearing structure 2 is aluminium package steel strand wires, its cross sectional area is not less than 25mm²The outer part of the bearing structure 2 is provided with a conductor I3, the outer part of the conductor I3 is sequentially provided with an insulating layer I4 and an insulating shielding layer I5 which are formed by double-layer co-extrusion, the lower conducting unit comprises two lower conducting subunits which are arranged in parallel in a circumscribed manner, the lower conducting subunit comprises a conductor II 6, the outer part of the conductor II 6 is sequentially provided with an insulating layer II 7 and an insulating shielding layer II 8 which are formed by double-layer co-extrusion, the conductor I3 and the conductor II 6 are both aluminum conductors, the cross-sectional areas of the conductors are equal, the insulating layer I4 and the insulating layer II 7 are both crosslinked polyethylene layers, the thickness of the insulating layer II 7 is not less than 2.5mm, the insulating shielding layer I5 and the insulating shielding layer II 8 are both semi-conducting layers, the thicknesses of the insulating shielding layers are both 0.6-0.8mm, and the outer sheath 1 integrally connects the upper conducting unit and the lower conducting unit, the middle part of the outer sheath 1 is in a connecting rib shape, the upper part of the outer sheath 1 is tightly extruded outside the upper conductive unit, the lower part of the outer sheath 1 is extruded outside the lower conductive unit, the upper part and the lower part of the outer sheath are both circular, and the thickness of the outer sheath 1 is not less than 1.6 mm. The utility model has the advantages that the whole structure is reasonable, the cable is wholly divided into an upper part and a lower part, the weight of the cable is balanced, and the cable is laid and does not run in the processThe cable is easy to shake, the upper part of the cable is an aluminum-clad steel structure outer stranded aluminum conductor bearing the tensile force of a stringing, the cross section of the bearing structure is mainly determined according to the tensile force of the cable erected on a tower pole, the weight distribution of the upper part and the lower part of the cable is considered to reduce the shaking of the cable in the air, the cable can be adjusted according to the cross section and the weight of the aluminum conductor, and the cross section value is not less than 25mm²The lower part is provided with two aluminum wire cores, the cross section of the aluminum wire core conductor is consistent with that of the upper part, the two aluminum conductor insulated wire cores are arranged in parallel and are not twisted, the current carrying capacity is improved, the conductor I and the conductor II are both aluminum conductors, the cross sections of the conductors are equal to form three-phase transmission current, the outer layers of the conductors are twisted and pressed, the smoothness of the insulated inner surface and the conductor interface is increased, the possibility of electric field concentration and partial discharge in the operation process of the cable is reduced, the thickness of the insulating layer is determined according to the voltage grade of the cable and is not less than 2.5mm, the insulating shielding layer is made of a semi-conductive material and plays a role of shielding the electric field of the wire cores, the thickness is 0.6-0.8mm, the insulating layer and the insulating shielding layer are extruded in a double-layer co-extrusion mode, the insulating layer and the insulating layer are tightly, the tight crowded package of upper portion is outside the sinle silk, and the crowded package of lower part is outside two parallel sinle silks, and the tight crowded package of upper portion sheath is when the sinle silk, and the atress is more stable, and lower part sheath has great space from top to bottom with two parallel sinle silks, and the heat dissipation is fast, can improve cable current-carrying capacity.

The utility model provides a thinking and method, the method and the way of specifically realizing this technical scheme are many, above only the utility model discloses a preferred embodiment should point out, to the ordinary technical personnel in this technical field, not deviating from the utility model discloses under the prerequisite of principle, can also make a plurality of improvements and moist decorations, these improvements should also be regarded as the utility model discloses a protection range, each component that does not make clear and definite in this embodiment all can be realized with prior art.

Claims

1. The utility model provides a balanced suspension type aerial insulated cable which characterized in that: it includes conductive element and lower conductive element, and they pass through oversheath (1) and connect, it includes bearing structure (2) to go up conductive element bearing structure (2) outside is equipped with conductor I (3) outside is equipped with insulating layer I (4) and insulating barrier I (5) in proper order, and they are double-deck crowded altogether to form, conductive element includes a plurality of conductive subelements down, and they are circumscribed parallel arrangement down, conductive subelement includes conductor II (6) down conductor II (6) outside is equipped with insulating layer II (7) and insulating barrier II (8) in proper order, and they are double-deck crowded altogether to form.

2. The balanced suspended overhead insulated cable of claim 1, wherein: the conductor I (3) and the conductor II (6) are both aluminum conductors, and the cross-sectional areas of the conductors are equal.

3. The balanced suspended overhead insulated cable of claim 1, wherein: the bearing structure (2) is an aluminum-clad steel strand, and the cross-sectional area of the aluminum-clad steel strand is not less than 25mm²。

4. The balanced suspended overhead insulated cable of claim 1, wherein: the number of the lower conductive subunits is two.

5. The balanced suspended overhead insulated cable of claim 1, wherein: and the insulating layer I (4) and the insulating layer II (7) are both crosslinked polyethylene layers, wherein the thickness of the insulating layer II (7) is not less than 2.5 mm.

6. The balanced suspended overhead insulated cable of claim 1, wherein: the insulation shielding layer I (5) and the insulation shielding layer II (8) are semi-conducting layers, and the thicknesses of the semi-conducting layers and the insulation shielding layers are 0.6-0.8 mm.

7. The balanced suspended overhead insulated cable of claim 1, wherein: the outer sheath (1) integrally connects the upper conductive unit and the lower conductive unit, the middle of the outer sheath is in a connecting rib shape, the upper part of the outer sheath (1) is tightly extruded outside the upper conductive unit, the lower part of the outer sheath (1) is extruded outside the lower conductive unit, the upper part and the lower part of the outer sheath are both circular, and the thickness of the outer sheath (1) is not less than 1.6 mm.