Compact aluminum alloy cable

Abstract

The utility model discloses a compact aluminum alloy cable, which comprises a first phase molded line conductor, a low-smoke flame-retardant outer sheath layer, a Z-shaped conductor layer and an insulating layer, wherein the low-smoke flame-retardant outer sheath layer is sleeved on the periphery of the first phase molded line conductor; and the Z-shaped conductor layer and the insulating layer are positioned between the first phase molded line conductor and the low-smoke flame-retardant outer sheath layer and are nested at intervals. The Z-shaped concentric conductor structure is adopted, the surface of the conductor is smooth and round, the thickness is uniform and stable after insulation extrusion, the structure is very compact, the use amount of outer layer materials is reduced, the cost is greatly reduced, and the operation safety of the cable is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power transmission, in particular to a compact aluminum alloy cable. Background Art

[0002] As one of the largest supporting industries in the national economy, wires and cables are an indispensable part of the power transmission and transformation equipment system and the foundation of various industries. They are widely used in large power stations and power transmission lines, airports, subways, river crossings, sea crossings and other occasions. They are known as the "blood vessels" and "nerves" of the national economy and are closely related to the development of the national economy. With the continuous development of urbanization in my country and the continuous improvement of industrial level, the power consumption and quality of electricity consumption have also increased year by year, and the compactness and lightness of cables have been required in different application occasions.

[0003] As we all know, the main conductor material of wires and cables in my country is copper, which has a relatively high price. As a conductor material, aluminum is somewhat different from copper. For this reason, we added a certain amount of Fe, Cu and other trace elements to pure aluminum to improve its mechanical and electrical properties, and made a new type of aluminum alloy conductive material. We invented a compact aluminum alloy cable with aluminum alloy as the conductor.

[0004] At present, most cables use copper and aluminum conductors to form insulated cores with extruded polymer insulation. Multiple insulated cores are twisted together into cables, and then a sheath with corresponding functions is set on the outer layer. There are gaps between the insulated cores of such cables, which need to be filled. The space utilization rate is not high, the outer diameter of the cable is large, and the cable structure is unstable. When the filling is not full or squeezed by external force, the insulated core is easily displaced and deformed, which affects the long-term stable operation of the cable. The present invention uses an aluminum alloy conductor, and the first phase conductor adopts a profile structure, and polypropylene (PP) insulation is extruded on its outer side. Then, a Z-shaped aluminum alloy single wire is concentrically wound around this phase insulated core as the second phase conductor. The Z-shaped single wires are embedded in each other, the structure is stable, and the surface is smooth and round. An insulating layer is extruded on its outer layer to form the second phase insulated core together. Then, the third phase insulated core is formed in sequence according to this method, and the overall concentric structure is formed. Finally, a layer of halogen-free low-smoke flame-retardant outer sheath is extruded as a protective layer. The present invention greatly reduces the outer diameter of the cable, facilitates the installation and laying of the cable, and improves the stability of the cable structure.

[0005] Conventional power cable insulation mostly uses polyvinyl chloride (PVC) and cross-linked polyethylene (XLPE) materials. PVC contains halogen Cl, which will produce HCl gas during production and combustion, causing harm to the human body and polluting the environment. XLPE needs to undergo a cross-linking reaction, which has a large energy loss and produces by-products during the cross-linking process, which affects the life of the cable body. At the same time, the cross-linked polyethylene material cannot be recycled and reused, and its subsequent processing is a difficult problem, which will bring huge challenges to the environment. The present invention uses modified polypropylene (PP) insulation material, which has higher heat resistance and mechanical performance than PVC and XLPE, and does not require cross-linking, and does not produce any by-products, which greatly reduces energy consumption. At the same time, it can be recycled and reused, and is very environmentally friendly.

[0006] Conventional cable conductors are mostly tightly compressed circular structures, with gaps, edges and corners on the outer surface, which affect the extrusion of the insulation layer. In severe cases, it can cause local heating of the cable body and breakdown and other faults. Utility Model Content

[0007] The utility model aims to provide a compact aluminum alloy cable to solve the technical problems mentioned in the background art of conventional cables.

[0008] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0009] The utility model provides a compact aluminum alloy cable, comprising a first phase type wire conductor, a low-smoke flame retardant outer sheath layer sleeved on the outer periphery of the first phase type wire conductor, and a Z-shaped conductor layer and an insulating layer located between the first phase type wire conductor and the low-smoke flame retardant outer sheath layer and nested at intervals.

[0010] Furthermore, the first phase line conductor includes an innermost circular conductor and multiple layers of trapezoidal cross-section conductors tightly surrounding the circular conductor.

[0011] Furthermore, a first phase insulating layer is provided on the outermost layer of the first phase type wire, and a second phase Z-shaped conductor layer is provided outside the first phase insulating layer, tightly surrounding its outer peripheral wall and mutually embedded;

[0012] A second phase insulating layer is provided on the outermost layer of the second phase Z-shaped conductor layer;

[0013] The outside of the second phase insulation layer tightly surrounds its outer peripheral wall and is mutually embedded with the third phase Z-shaped conductor layer; the third phase insulation layer is arranged outside the third phase Z-shaped conductor layer, and the low-smoke flame-retardant outer sheath layer is arranged outside the third phase insulation layer.

[0014] Furthermore, the first phase insulation layer, the second phase insulation layer, and the third phase insulation layer are all made of PP insulation material.

[0015] Compared with the prior art, the beneficial technical effects of the utility model are:

[0016] The present application adopts a Z-shaped concentric conductor structure, the conductor surface is smooth and round, the thickness of the insulation after extrusion is uniform and stable, and the structure is very compact, which reduces the amount of outer layer material used, greatly reduces the cost, and improves the safety of cable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model will be further described below in conjunction with the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the internal main structure of the cable as a whole in the radial direction of the outer sheath;

[0019] Explanation of the reference numerals: 1. 1st phase line conductor; 2. 1st phase insulation layer; 3. 2nd phase Z-shaped conductor layer; 4. 2nd phase insulation layer; 5. 3rd phase Z-shaped conductor layer; 6. 3rd phase insulation layer; 7. Low-smoke flame-retardant outer sheath layer. DETAILED DESCRIPTION

[0020] The present embodiment discloses a compact aluminum alloy cable, comprising a first phase-type wire conductor 1, a low-smoke flame-retardant outer sheath layer 7 sleeved on the outer periphery of the first phase-type wire conductor 1, and a Z-shaped conductor layer and an insulating layer located between the first phase-type wire conductor 1 and the low-smoke flame-retardant outer sheath layer 7 and nested at intervals.

[0021] In this embodiment, the first phase line conductor includes an innermost circular conductor and multiple layers of trapezoidal cross-section conductors tightly surrounding the circular conductor.

[0022] In this embodiment, a first phase insulating layer 2 is sleeved on the outermost layer of the first phase type wire, and a second phase Z-shaped conductor layer 3 is tightly surrounded by the outer peripheral wall of the first phase insulating layer 2 and embedded in each other;

[0023] A second phase insulating layer 4 is provided on the outermost layer of the second phase Z-shaped conductor layer 3;

[0024] The outside of the second phase insulation layer 4 tightly surrounds its outer peripheral wall and is embedded with the third phase Z-shaped conductor layer 5; the third phase insulation layer 6 is sheathed on the outside of the third phase Z-shaped conductor layer 5, and the low-smoke flame-retardant outer sheath layer 7 is sheathed on the outside of the third phase insulation layer 6.

[0025] In this embodiment, the first phase insulation layer 2 , the second phase insulation layer 4 , and the third phase insulation layer 6 are all made of PP insulation material.

[0026] like Figure 1As shown, a compact aluminum alloy environmentally friendly cable includes a copper conductor 1 for transmitting current and connected to accessories; an insulating layer 2 is extruded outside the conductor 1, a Z-shaped single-wire conductor 3 is concentrically wound outside the polypropylene (PP) insulation layer 2, an insulating layer 4 is extruded outside the concentric conductor 3, a Z-shaped single-wire conductor 5 is concentrically wound outside the polypropylene (PP) insulation layer 4, an insulating layer 6 is extruded outside the concentric conductor 5, and the outermost layer is extruded with an environmentally friendly halogen-free, low-smoke, flame-retardant polyolefin outer sheath 7 to protect the inner layer structure from external mechanical damage and environmental corrosion.

[0027] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

[0028] The above embodiments are only descriptions of the preferred methods of the invention, and are not intended to limit the scope of the invention. Without departing from the design spirit of the invention, various modifications and improvements made to the technical solution of the invention by ordinary technicians in this field should fall within the protection scope of the claims of the invention.

Claims

1. A compact aluminum alloy cable, characterized in that: The invention comprises a first phase type line conductor (1), a low-smoke flame retardant outer sheath layer (7) sleeved on the outer periphery of the first phase type line conductor (1), and a Z-shaped conductor layer and an insulating layer located between the first phase type line conductor (1) and the low-smoke flame retardant outer sheath layer (7) and nested in an interval.

2. The compact aluminum alloy cable according to claim 1, characterized in that: The first phase line conductor includes an innermost circular conductor and multiple layers of trapezoidal cross-section conductors tightly surrounding the circular conductor.

3. The compact aluminum alloy cable according to claim 2, characterized in that: A first phase insulating layer (2) is arranged on the outermost layer of the first phase type wire, and a second phase Z-shaped conductor layer (3) is arranged outside the first phase insulating layer (2) to tightly surround its outer peripheral wall and to be mutually embedded; A second phase insulating layer (4) is provided on the outermost layer of the second phase Z-shaped conductor layer (3); The outside of the second phase insulation layer (4) tightly surrounds its outer peripheral wall and is mutually embedded with a third phase Z-shaped conductor layer (5); a third phase insulation layer (6) is arranged outside the third phase Z-shaped conductor layer (5), and a low-smoke flame-retardant outer sheath layer (7) is arranged outside the third phase insulation layer (6).

4. The compact aluminum alloy cable according to claim 3, characterized in that: The first phase insulation layer (2), the second phase insulation layer (4) and the third phase insulation layer (6) are all made of PP insulation material.

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