CN211376210U

CN211376210U - Aluminum core polyvinyl chloride insulation low density polyethylene sheath parallel bundling cable

Info

Publication number: CN211376210U
Application number: CN201922363732.8U
Authority: CN
Inventors: 高红阳; 宋相彬; 赵彦文
Original assignee: Wuxi Jiangnan Cable Co Ltd
Current assignee: Wuxi Jiangnan Cable Co Ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-08-28
Anticipated expiration: 2029-12-25

Abstract

The utility model discloses an aluminum core polyvinyl chloride insulation low density polyethylene sheath parallel bunched cable, which comprises two parallel conductors arranged in a straight dragging way, wherein each conductor is externally extruded with polyvinyl chloride insulation layers with different colors to form two insulation wire cores; the upper surface and the lower surface of the integrated linear low-density polyethylene outer sheath are wavy and are jointly extruded outside the two insulated wire cores by a double-channel opposite extrusion type die, the height of the integrated linear low-density polyethylene outer sheath in the vertical direction is controlled to be 12.1 +/-0.1 mm, the width of the integrated linear low-density polyethylene outer sheath in the parallel direction is controlled to be 23 +/-1 mm, and the height of the integrated linear low-density polyethylene outer sheath in the vertical direction at the middle connection part is controlled to be 7.8 +/-0.1 mm. The cable outer sheath is connected into a whole by extrusion forming to form parallel bundling, the combined breaking force is integrally increased, compared with a common bundling wire, the construction is simple and convenient, a large amount of metal consumption and construction working hours can be reduced, the wire can be laid along a wall, and towers and cost are reduced; compared with the traditional parallel bunched cable, the cable has better insulation and physical and mechanical properties.

Description

Aluminum core polyvinyl chloride insulation low density polyethylene sheath parallel bundling cable

Technical Field

The utility model relates to a cable field, concretely relates to parallel bunched cable of insulating low density polyethylene sheath of aluminium core polyvinyl chloride.

Background

A parallel cluster overhead insulated cable (a parallel cluster wire for short) is a product popularized and applied in fifteen-science and technology planning of rural power grid construction of a national electric company; the reactance of the low-voltage power supply line consists of impedance, capacitive reactance and inductive reactance; the parallel bundling wires adopt three-phase four-wire power supply, so that the unbalanced degree of three-phase load of the distribution transformer is reduced to be extremely low, and the current of a neutral wire is reduced, thereby reducing the resistance loss; because the conducting wires are combined in a bundling shape, the large breaking resistance is multiplied compared with that of a single wire, the single-phase wire breakage accident is reduced, the rapid development of the economy of all countries in the world is accompanied, the power grid construction is developed rapidly, the existing power transmission line cannot meet the existing power transmission, the town power grid construction is developed with a rapid and rapid increase, the existing parallel bundling overhead cable (or parallel bundling conducting wire) generally comprises a plurality of single cables and connecting ribs for connecting the adjacent single cables, and due to the design problem of the connecting positions of the connecting ribs and the single cables, the outer surface of the cable after the whole cable is folded has a deep cable trench, and rainwater, dust and the like are easy to accumulate. When water is accumulated on the surface of the cable for a long time, after the water is absorbed by insulation, the insulation surface resistance, the volume resistance and the breakdown field intensity are reduced, and the capacitance and the dielectric loss tangent are increased, so that the insulation life of the cable is shortened.

The single insulated wires of the existing twisted bunched cable are twisted together, so that a plurality of working procedures are needed in processing, and large-scale and expensive cabling equipment is needed.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: in order to overcome the defects in the prior art, the aluminum core polyvinyl chloride insulation low-density polyethylene sheath parallel bunched cable is provided.

The technical scheme is as follows: in order to achieve the purpose, the utility model provides an aluminum core polyvinyl chloride insulation low density polyethylene sheath parallel bunched cable, which comprises two parallel conductors arranged in a straight dragging way, wherein each conductor is externally extruded with polyvinyl chloride insulation layers with different colors to form two insulation wire cores; the outer surface of the polyvinyl chloride insulating layer is coated with polyurethane waterproof paint or covered with a polyurethane waterproof film, a double-channel opposite extrusion type die is adopted to jointly extrude and wrap an integrated linear low-density polyethylene outer sheath with the upper surface and the lower surface in a wavy shape outside two insulating wire cores, the height of the integrated linear low-density polyethylene outer sheath in the vertical direction is controlled to be 12.1 +/-0.1 mm, the width of the integrated linear low-density polyethylene outer sheath in the parallel direction is controlled to be 23 +/-1 mm, and the height of the integrated linear low-density polyethylene outer sheath in the vertical direction at the middle connection position is controlled to be 7.8 +/-0..

Furthermore, the conductor is formed by twisting 7 aluminum conductors with the diameter of 2.15 mm.

Furthermore, the thickness of the polyvinyl chloride insulating layer is 1.4 +/-0.1 mm.

Further, the thickness of the integrated outer sheath made of linear low density polyethylene is 1.4mm +/-0.1 mm.

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

the outer shields of all cables in the parallel bunched cables are connected into a whole through extrusion forming to form the parallel bunched cables, the combined breaking force is integrally increased, compared with a common bunched wire, the construction is simple and convenient, a large amount of metal consumption and construction working hours can be reduced, the wire can be laid along a wall, and towers and cost are reduced; compared with the traditional parallel bunched cable, the cable has better insulation and physical and mechanical properties; the cable is low in cost and convenient to erect, and plays an important role in future economic construction, social development and the like of all countries in the world by virtue of the special technical advantages of the cable; the parallel bunched cable can be formed in one step in production, so that the production efficiency is improved, the manufacturing cost is reduced, and the working procedures and production equipment are simplified; each cable core is stressed uniformly, and under the action of tension, the insulation of the cable is not pressed; and the arrangement of the integrated outer sheath pulls the distance between the lines open, improves the insulation level, improves the heat dissipation condition, and particularly reduces the probability of short circuit between the lines when the integrated outer sheath is unfolded and laid along a wall.

Drawings

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

Detailed Description

The present invention will be further clarified by the following description with reference to the attached drawings and specific examples, which should be understood as being merely illustrative of the present invention and not limiting the scope of the present invention, and modifications of various equivalent forms of the present invention by those skilled in the art after reading the present invention, all fall within the scope defined by the appended claims of the present application.

As shown in fig. 1, the utility model provides an aluminum core polyvinyl chloride insulation low density polyethylene sheath parallel bunched cable, which comprises two parallel conductors arranged in a straight pulling way, wherein the conductors are formed by twisting 7 aluminum conductors 1 with the diameter of 2.15 mm; each conductor is externally extruded with polyvinyl chloride insulating layers 2 with different colors, the thickness is 1.4 +/-0.1 mm, and two insulating wire cores are formed; the upper surface and the lower surface of the integrated linear low-density polyethylene outer sheath 4 which is wavy are jointly extruded outside the two insulated wire cores by adopting a double-channel opposite extrusion type extrusion die and a process, and the thickness of the integrated linear low-density polyethylene outer sheath is 1.4mm +/-0.1 mm, so that the stress of a molten material is balanced, and the eccentricity of the sheath is effectively controlled; the height of the integrated linear low-density polyethylene outer sheath in the vertical direction is controlled to be 12.1 +/-0.1 mm, the width of the integrated linear low-density polyethylene outer sheath in the parallel direction is controlled to be 23 +/-1 mm, and the height of the integrated linear low-density polyethylene outer sheath in the vertical direction between the lowest positions of the middle connection is controlled to be 7.8 +/-0.1 mm, so that the design ensures the roundness of the outer sheath of the cable, and the radians of two sides of the middle groove are gentle; the outer shields are connected into a whole by extrusion forming to form parallel bundling, the combined breaking force is integrally increased, compared with a common bundling wire, the construction is simple and convenient, a large amount of metal consumption and construction working hours can be reduced, the wire can be laid along a wall, the tower and the cost are reduced, and compared with a traditional parallel bundling cable, the cable has better insulation and physical and mechanical properties; in order to avoid water accumulation at the groove of the integrated linear low-density polyethylene outer sheath 4, after moisture is absorbed by insulation, the insulation surface resistance, the volume resistance and the breakdown field strength are reduced, and the capacitance and the dielectric loss tangent are increased, so that the problem that the insulation life of the cable is shortened is caused, a polyurethane waterproof coating is coated on the outer surface of the polyvinyl chloride insulation layer or a polyurethane waterproof film 3 is attached on the outer surface of the polyvinyl chloride insulation layer.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides an insulating low density polyethylene sheath parallel bunched cable of aluminium core polyvinyl chloride which characterized in that: the cable comprises two parallel conductors which are arranged in a straight dragging way, wherein each conductor is externally extruded with polyvinyl chloride insulating layers with different colors to form two insulating cable cores; the outer surface of the polyvinyl chloride insulating layer is coated with polyurethane waterproof paint or covered with a polyurethane waterproof film, a double-channel opposite extrusion type die is adopted to jointly extrude and wrap an integrated linear low-density polyethylene outer sheath with the upper surface and the lower surface in a wavy shape outside two insulating wire cores, the height of the integrated linear low-density polyethylene outer sheath in the vertical direction is controlled to be 12.1 +/-0.1 mm, the width of the integrated linear low-density polyethylene outer sheath in the parallel direction is controlled to be 23 +/-1 mm, and the height of the integrated linear low-density polyethylene outer sheath in the vertical direction at the middle connection position is controlled to be 7.8 +/-0..

2. The aluminum-core polyvinyl chloride insulated low-density polyethylene sheath parallel bunched cable of claim 1, wherein: the conductor is formed by twisting 7 aluminum conductors with the diameter of 2.15 mm.

3. The aluminum-core polyvinyl chloride insulated low-density polyethylene sheath parallel bunched cable of claim 1, wherein: the thickness of the polyvinyl chloride insulating layer is 1.4 +/-0.1 mm.

4. The aluminum-core polyvinyl chloride insulated low-density polyethylene sheath parallel bunched cable of claim 1, wherein: the thickness of the integrated linear low-density polyethylene outer sheath is 1.4mm +/-0.1 mm.