CN2388691Y

CN2388691Y - Special cable wire

Info

Publication number: CN2388691Y
Application number: CN 99238640
Authority: CN
Inventors: 罗振年
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-09-03
Filing date: 1999-09-03
Publication date: 2000-07-19
Anticipated expiration: 2009-09-03

Abstract

The utility model relates to a special cable core wire. The section of a cable core wire is designed into a structure with small sectional area but longer peripheral edges, and the specific shapes of the section of the cable core wire are thin rectangles and hollow opening shapes; the sectional shapes of the hollow opening shape are hollow opening squares, hollow opening rectangles, hollow opening triangles, hollow opening circles, etc. The utility model uses skin effect of electricity to reduce sectional area and weight under the condition of having the same current loading amount as the existing solid core wires, so that the production cost of cables is saved, and the labour intensity of cable installation is reduced.

Description

Special-shaped cable core

The utility model relates to electricity, particularly service cable.

For a long time, people be load capacity with the electric current area of section that decides selected cable core, and the core section of cable are also all made solid circles when selecting cable always.In fact, it is irrational selecting the method for cable for use according to sectional area, because this method has been ignored a key property of electricity (electric current)---" kelvin effect " of electricity fully.That is to say that electricity (electric current) only is present in surface of conductors, and does not have at the center of conductor (or inner surface).According to this characteristic as can be known, the ampacity of conductor (heart yearn) and the size of its sectional area have nothing to do, and only relevant with girth, the shape in its cross section.

The purpose of this utility model is that a kind of cross section of design is the cable core of non-solid circles, the feature in this cable core cross section is to have less area and have bigger peripheral length, cable with this cable core making, have the effect of using less conductor material and obtaining bigger energising amount, thereby reach economical with materials, alleviate the purpose of deadweight.

The utility model becomes the little and peripheral long structure of sectional area with the cable core Cross section Design, require to select certain shape and thickness according to mechanics simultaneously, concrete shape has thin rectangular shape cross section and hollow opening tee section, the length-width ratio in thin rectangular shape cross section is more than 20, and the shape in open hollow type cross section has hollow square opening, hollow opening rectangle, hollow open-delta, hollow opening garden shape etc.

The Cross section Design of cable core of the present utility model is Zhou Bianchang and the cross section is little, because the effect of " kelvin effect " of electricity has under the situation of same current loading amount with existing solid heart yearn, sectional area of the present utility model reduces greatly, and weight alleviates greatly.Thereby can save the production cost of cable greatly, and reduce the labour intensity that cable is installed.

Below in conjunction with accompanying drawing the utility model is further described:

Fig. 1 is thin rectangular shape core section figure,

Fig. 2 is hollow opening rectangle heart yearn sectional view,

Fig. 3 is hollow open-delta core section figure,

Fig. 4 is hollow open circles core line sectional view,

The construction of cable sectional view of Fig. 5 for making with hollow open-delta heart yearn.

As the fundamental section layout of Fig. 1-4, be to design in order to obtain long peripheral length, as the thin rectangular shape structure of Fig. 1, this structure can also become different shape with thin plate bending.As Fig. 2-4 is that cross section with different shape changes hollow opening shape into, but the effect of opening is the surface of inner surface being changed into live.

Fig. 5 is an application example of the present utility model, at the hollow parts fill insulant 3 of heart yearn 1, wraps insulating protective layer 2 outside and forms cable.

Claims

1, special-shaped cable core is characterized in that: the cable core Cross section Design becomes sectional area little and peripheral long thin rectangular shape structure or hollow opening shape structure.

2, special-shaped cable core according to claim 1, it is characterized in that: the length-width ratio in thin rectangular shape cross section is greater than 20.

3, special-shaped cable core according to claim 1 is characterized in that: there are hollow square opening, hollow opening rectangle, hollow open-delta, hollow opening garden shape etc. in the cross section of the hollow open-type of cable core.