CN202677942U

CN202677942U - 'SZ' type concentric conductor low-voltage power cable

Info

Publication number: CN202677942U
Application number: CN 201220343404
Authority: CN
Inventors: 张仲韬
Original assignee: Jiangsu Hengtong Power Cable Co Ltd
Current assignee: Jiangsu Hengtong Power Cable Co Ltd
Priority date: 2012-07-16
Filing date: 2012-07-16
Publication date: 2013-01-16
Anticipated expiration: 2022-07-16

Abstract

The utility model relates to an 'SZ' type concentric conductor low-voltage power cable, which comprises conductors, insulating layers coated outside the conductors respectively, a wrapping layer coated outside the insulating layers, a lining layer coated outside the wrapping layer and an outer sheath coated outside the lining layer, wherein concentric conductors are wrapped outside the lining layer and inside the outer sheath, the stranding pitch of concentric conductors consists of a first half and a second half, and the first-half concentric conductors and the second-half concentric conductors rotate in different directions. The 'SZ' type concentric conductor low-voltage power cable has the advantages of being better in bending performance, good in roundness, smaller in volume and convenient to transport and install due to the additional arrangement of the 'SZ' type concentric conductors; the problems of the cable such as big filling volume, poor roundness and large outer diameter are solved; extrusion force on cable cores is small and the lining layer can be prevented from being extruded by the concentric conductors effectively; and the 'SZ' type concentric conductors can not only be used as a neutral line of the cable, but also can be used as a metal shield.

Description

" SZ " type concentric conductor lv power cable

Technical field

The utility model relates to power cable, particularly relates to a kind of " SZ " type concentric conductor lv power cable.

Background technology

0.1//1kV lv power cable core number comprises: single core, two hearts, 3 cores, 3+2, fourth class core, 4+1 core, 5 cores.Traditional 3+1 core cable is three phase lines and a neutral line stranding, simultaneously wrapped band, extrude inner covering (armoured cable), armouring (if having), oversheath, as shown in Figure 1.This structural cable, the outside diameter of cable is large, and the cable filling amount is large, and the cable roundness is poor.

Summary of the invention

The purpose of this utility model provides a kind of " SZ " type concentric conductor lv power cable.

For achieving the above object, the technical solution adopted in the utility model is:

A kind of " SZ " type concentric conductor lv power cable, comprise conductor, be coated on described conductor outside insulating barrier, be coated on described insulating barrier outside lapping layer, be coated on the inner covering of described lapping layer outside and the oversheath that is coated on described inner covering outside, described inner covering is outer, be surrounded with concentric conductor in the oversheath, the twisting pitch of described concentric conductor comprises first half section, second half section, and the described concentric conductor of first half section is not identical with the direction of rotation of described concentric conductor of second half section.

Preferably, the described concentric conductor of first half section is rotated in a clockwise direction the first angle, and the second half section, described concentric conductor rotated the second angle in the counterclockwise direction, and described the first angle, the second angle equate.

Further preferably, described the first angle, the second angle are less than 360 degree.

Further preferably, described the first angle, the second angle are about 270 degree.

Preferably, described concentric conductor is used the soft copper silk for the electrician.

Because technique scheme is used, the utility model compared with prior art has following advantages:

The utility model is better by the bending property that increases its cable of " SZ " type concentric conductor, rounding property good, volume reduces, and is convenient to transportation, the installation of cable; And solved the problem that the cable filling amount is large, rounding property is poor, external diameter is large; Little to the cable core extruding force, can effectively prevent concentric conductor to the extruding of inner covering; " SZ " type concentric conductor both can be used as the neutral line of cable in addition, also can be used as metallic shield.

Description of drawings

Accompanying drawing 1 is the structural representation of 3+1 core lv power cable in the prior art;

Accompanying drawing 2 is the structural representation of the utility model 3+1 core lv power cable;

Accompanying drawing 3 is the utility model 3+1 core lv power cable manufacture method schematic diagram one;

Accompanying drawing 4 is the utility model 3+1 core lv power cable manufacture method schematic diagram two.

Wherein: 1, conductor element; 10, conductor; 11, insulating barrier; 12, lapping layer; 2, inner covering; 3, concentric conductor; 4, oversheath; 5, fill; 6, soft copper silk.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described:

A kind of " SZ " type concentric conductor lv power cable as shown in Figure 2, take the 3+1 core as example: comprise conductor 10, be coated on conductor 10 outsides insulating barrier 11, be coated on the lapping layer 12 of insulating barrier 11 outsides, the oversheath 4 that is coated on the inner covering 2 of lapping layer 12 outsides and is coated on inner covering 2 outsides.Specifically:

Inner covering 2 is outer, be surrounded with concentric conductor 3 in the oversheath 4, it is material with the soft copper silk that concentric conductor 3 adopts the electrician, the twisting pitch of concentric conductor 3 comprises first half section, second half section, such as first half section concentric conductor 3 (S to) rotation the first angle along clockwise direction, second half section concentric conductor 3 is (Z-direction) rotation the second angle in the counterclockwise direction, and the first angle, the second angle equate, to rotate 270 degree as optimum.

Shown in Fig. 3,4: the processing method of " SZ " type concentric conductor is, separation take the B point as first half section, second half section, keep the B point motionless, the A point is to turn clockwise, then formed between A, B S to, when cable travels forward by certain speed, if the B point add a lapping device with S to fixing, cable is gone ahead behind the certain distance, A is pressed be rotated counterclockwise, at this moment between AB, just formed Z-direction, carry out again Z-direction when then cable advances to the B point and fix, the repeatedly rotation of ordering owing to A like this, it is stranded just to have formed so " SZ " on cable.

Above-described embodiment only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the personage who is familiar with technique can understand content of the present utility model and according to this enforcement, can not limit protection range of the present utility model with this.All equivalences of doing according to the utility model Spirit Essence change or modify, and all should be encompassed within the protection range of the present utility model.

Claims

1. " SZ " type concentric conductor lv power cable, comprise conductor, be coated on described conductor outside insulating barrier, be coated on described insulating barrier outside lapping layer, be coated on the inner covering of described lapping layer outside and the oversheath that is coated on described inner covering outside, it is characterized in that: described inner covering is outer, be surrounded with concentric conductor in the oversheath, the twisting pitch of described concentric conductor comprises first half section, second half section, and the described concentric conductor of first half section is not identical with the direction of rotation of described concentric conductor of second half section.

2. " SZ " according to claim 1 type concentric conductor lv power cable, it is characterized in that: the described concentric conductor of first half section is rotated in a clockwise direction the first angle, second half section, described concentric conductor rotated the second angle in the counterclockwise direction, and described the first angle, the second angle equate.

3. " SZ " according to claim 2 type concentric conductor lv power cable is characterized in that: described the first angle, the second angle are less than 360 degree.

4. " SZ " according to claim 3 type concentric conductor lv power cable is characterized in that: described the first angle, the second angle are about 270 degree.

5. " SZ " according to claim 1 type concentric conductor lv power cable, it is characterized in that: described concentric conductor is used the soft copper silk for the electrician.