CN214847883U

CN214847883U - Molded line stranded copper conductor for low-voltage power cable

Info

Publication number: CN214847883U
Application number: CN202121480912.5U
Authority: CN
Inventors: 杜文杰; 赵恒新; 王涛; 丁林艳; 杨李琴
Original assignee: Jinbei Ta Pai Cables Co ltd
Current assignee: Jinbei electric (Chengdu) Co.,Ltd.
Priority date: 2021-07-01
Filing date: 2021-07-01
Publication date: 2021-11-23
Anticipated expiration: 2031-07-01

Abstract

The utility model discloses a molded lines transposition copper conductor for low pressure power cable, include: the copper conductor comprises an inner layer and an outer layer, wherein the outer layer with a plurality of layers is sequentially closely twisted on the inner layer. The utility model discloses in, this molded lines stranded copper conductor for low pressure power cable adopts the combination of circular monofilament frame tile shape monofilament to form, and the design of tile shape monofilament uses the conductor ring to equally divide the design to be the basis, just is a circular after the combination itself, holds must very big clamping force just formable, consequently for circular conductor that sticiss, this molded lines stranded copper conductor, the work hardening is littleer, and the contact surface is big and inseparable between the monofilament, and the conductor surface is more smooth.

Description

Molded line stranded copper conductor for low-voltage power cable

Technical Field

The utility model relates to a copper conductor technical field especially relates to a low pressure is molded lines transposition copper conductor for power cable.

Background

With the release and implementation of the GB/T20141-2006 molded line concentric stranded overhead conductor, the molded line stranding technology starts to be popularized in China, and the reverse national standards GB/T12706-once 2020 and GB/T3956-once 2008 do not mention that the 2 nd compressed conductor for the cable needs to be compressed and stranded by using round monofilaments, and the production of the copper conductor for the cable by adopting the molded line compressed and stranded is not good.

In order to effectively reduce the overall dimension of the cable, reduce the actual sectional area of the conductor and reduce the comprehensive cost of the cable, most manufacturers adopt a pressing round, fan-shaped or tile-shaped mode to optimize the overall dimension of the copper conductor of the cable. However, excessive compression can cause the copper monofilament to harden and deform seriously, and the copper conductor of the cable is hard and the actual cross-sectional area of the conductor is large.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a low pressure is molded lines transposition copper conductor for power cable adopts the combination of circular monofilament frame tile shape monofilament to form, and the design of tile shape monofilament uses the conductor ring to equally divide the design as the basis, just is a circular after the combination itself, holds very big stiction just formable, consequently for circular conductor that sticiss, molded lines transposition copper conductor, and the work hardening is littleer, and the contact surface is big and inseparable between the monofilament, and the conductor surface is more smooth.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a molded-wire stranded copper conductor for a low-voltage power cable, comprising: the copper conductor comprises an inner layer and an outer layer, wherein the inner layer is sequentially closely stranded with the outer layer with a plurality of layers;

the outer surface of the copper conductor is coated with an oxidation resistant layer, and the outer surface of the oxidation resistant layer is provided with a cold tin plating layer.

As a further description of the above technical solution:

the inner layer is a round monofilament.

As a further description of the above technical solution:

the outer layer is composed of a plurality of tile-shaped monofilaments, and the plurality of tile-shaped monofilaments are tightly twisted on the inner layer.

As a further description of the above technical solution:

the outer number of layers is two, and the outer layer that is located inside comprises a plurality of tile row monofilament, and a plurality of tile row monofilament is hugged closely the transposition on the inlayer, and the outer layer that is located outside also comprises a plurality of tile row monofilament, and a plurality of tile row monofilament is hugged closely the transposition on the outer layer that is located inside.

As a further description of the above technical solution:

the outer number of piles is the three-layer, and the outer layer that is located inside comprises a plurality of tile row monofilament, and a plurality of tile row monofilament is hugged closely the transposition on the inlayer, and the outer layer that is located the middle part comprises a plurality of tile row monofilament, and a plurality of tile row monofilament is hugged closely the transposition and is being located inside outer, and the outer layer that is located outside comprises a plurality of tile row monofilament, and a plurality of tile row monofilament is hugged closely the transposition and is being located the outer at middle part.

As a further description of the above technical solution:

the diameter of the round monofilaments is 2.5mm and 2.9 mm.

As a further description of the above technical solution:

the thickness of the anti-oxidation layer is 2.5-2.9 microns.

As a further description of the above technical solution:

the thickness of the cold tin plating layer is 2.5-2.9 microns.

The number of the tile-shaped monofilaments of the outer layer is increased from inside to outside in sequence. The increased number of corrugated monofilaments ensures the softness of the overall conductor.

The volume resistivity of the wire-type twisted copper conductor is 0.0173 omega mm²And/m and below.

The utility model provides a molded lines transposition copper conductor for low pressure power cable. The method has the following beneficial effects:

(1) the molded line stranded copper conductor for the low-voltage power cable is formed by combining round single-wire frame tile-shaped monofilaments, the tile-shaped monofilaments are designed on the basis of conductor ring even distribution design, and are round after being combined, and can be formed only by needing great compression force, so that the molded line stranded copper conductor has smaller processing hardening, large and compact contact surface between the monofilaments and smoother conductor surface compared with a round compressed conductor.

(2) This molded lines stranded copper conductor for low pressure power cable, the inlayer is unified to circular structure, can effectively reduce production pressure, improves production efficiency, conductor structure is divided according to a series, maneuverability is big, the conductor sticiss the degree little, the filling coefficient is big, conductor volume resistivity is good, can reduce the copper product consumption, the conductor external diameter reduces, can practice thrift insulating material, the contact surface is big between the monofilament, the eddy current loss is little, conductor surface is smooth, the clearance is little, the electric field is balanced, product quality is more stable, life is longer.

(3) This molded lines transposition copper conductor for low pressure power cable through the setting that is provided with oxidation resisting layer, can effectually prevent the copper conductor oxidation, through being provided with cold tin coating for the copper conductor does not turn hard, and the compliance is good, and working property is good.

Drawings

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

fig. 2 is a schematic structural diagram of a third embodiment of the present invention;

fig. 3 is a schematic structural diagram of a fourth embodiment of the present invention.

Illustration of the drawings:

1. a copper conductor; 2. an inner layer; 3. an outer layer; 4. an anti-oxidation layer; 5. and (5) cold-plating a tin layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In the first embodiment, referring to fig. 1 to 3, a molded line stranded copper conductor for a low-voltage power cable includes a copper conductor 1, the copper conductor 1 includes an inner layer 2 and an outer layer 3, the outer layer 3 with a plurality of layers is sequentially and closely stranded on the inner layer 2, the inner layer 2 is a round monofilament, and the diameter of the round monofilament is 2.5mm and 2.9 mm.

Second embodiment, referring to fig. 1, the number of the outer layer 3 is one, the outer layer 3 is composed of a plurality of tile-shaped monofilaments, and the plurality of tile-shaped monofilaments are closely twisted on the inner layer 2.

In the third embodiment, referring to fig. 2, the number of the outer layer 3 is two, the inner outer layer 3 is composed of a plurality of tile-shaped monofilaments, the plurality of tile-shaped monofilaments are closely twisted on the inner layer 2, the outer layer 3 is also composed of a plurality of tile-shaped monofilaments, and the plurality of tile-shaped monofilaments are closely twisted on the inner outer layer 3.

In the fourth embodiment, referring to fig. 3, the number of layers of the outer layer 3 is three, the outer layer 3 located inside is composed of a plurality of tile-shaped monofilaments, the plurality of tile-shaped monofilaments are tightly twisted on the inner layer 2, the outer layer 3 located in the middle is composed of a plurality of tile-shaped monofilaments, the plurality of tile-shaped monofilaments are tightly twisted on the outer layer located inside and 3, the outer layer 3 located outside is composed of a plurality of tile-shaped monofilaments, and the plurality of tile-shaped monofilaments are tightly twisted on the outer layer 3 located in the middle.

In the fifth embodiment, referring to fig. 1, the outer surface of the copper conductor 1 is coated with an oxidation resistant layer 4, the outer surface of the oxidation resistant layer 4 is provided with a cold tin plating layer 5, the thickness of the oxidation resistant layer 4 is 2.5-2.9 micrometers, and the thickness of the cold tin plating layer 5 is 2.5-2.9 micrometers.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The molded line stranded copper conductor for the low-voltage power cable is characterized by comprising a copper conductor (1), wherein the copper conductor (1) comprises an inner layer (2) and an outer layer (3), and the inner layer (2) is sequentially and closely stranded with the outer layer (3) with a plurality of layers;

the surface cladding of copper conductor (1) has oxidation resisting layer (4), oxidation resisting layer (4) surface is provided with cold tin coating (5).

2. A shaped stranded copper conductor for low voltage power cables, according to claim 1, characterized in that said inner layer (2) is a round monofilament.

3. The molded stranded copper conductor for the low-voltage power cable according to claim 1, wherein the number of the outer layer (3) is one, the outer layer (3) is composed of a plurality of tile-shaped monofilaments, and the plurality of tile-shaped monofilaments are closely stranded on the inner layer (2).

4. The molded stranded copper conductor for the low-voltage power cable according to claim 1, wherein the number of the outer layer (3) is two, the inner outer layer (3) is composed of a plurality of corrugated monofilaments, the plurality of corrugated monofilaments are tightly stranded on the inner layer (2), the outer layer (3) is also composed of a plurality of corrugated monofilaments, and the plurality of corrugated monofilaments are tightly stranded on the inner outer layer (3).

5. The molded stranded copper conductor for the low-voltage power cable according to claim 1, wherein the number of layers of the outer layer (3) is three, the inner outer layer (3) is composed of a plurality of corrugated monofilaments, the plurality of corrugated monofilaments are closely stranded on the inner layer (2), the middle outer layer (3) is composed of a plurality of corrugated monofilaments, the plurality of corrugated monofilaments are closely stranded on the inner outer layer (3), the outer layer (3) is composed of a plurality of corrugated monofilaments, and the plurality of corrugated monofilaments are closely stranded on the middle outer layer (3).

6. A shaped wire stranded copper conductor for low voltage power cable according to claim 2, characterized in that the diameter of said round monofilament is 2.5mm and 2.9 mm.

7. A shaped stranded copper conductor for low voltage power cables, according to claim 1, characterized in that the thickness of the oxidation resistant layer (4) is 2.5-2.9 microns.

8. The stranded copper conductor of claim 1, wherein the thickness of the cold tin coating (5) is 2.5-2.9 μm.

9. A copper conductor according to any one of claims 3 to 5, characterized in that the number of said corrugated monofilaments in the outer layer (3) increases from the inside to the outside.

10. The type-stranded copper conductor for low-voltage power cable according to claim 1, wherein the volume resistivity of the type-stranded copper conductor is 0.0173 Ω mm²And/m and below.