CN204215743U - A kind of single core layer-stepping milliken conductor - Google Patents

Abstract

The utility model discloses a kind of single core layer-stepping milliken conductor, this conductor comprises center single line layer, the first single line layer, the second single line layer, the 3rd single line layer from inside to outside, is equipped with sulphurated siliastic layer outside every layer of single line layer.The utility model improves and is to adopt layer-stepping difformity single line structure, and single-component room-temperature-vulsilicone silicone rubber or two-component room-temperature-vulcanized silicone rubber is coated with on every layer of single line, make, outside single line layer, there is insulating barrier, every layer of single line layer is effectively split isolation, make every layer of single line form independently stock block, kelvin effect can be reduced, improve ampacity; The silicone rubber insulation material of coating makes fully to fill between conductor gap, reduces conductor gap, and single-component room-temperature-vulsilicone silicone rubber or two-component room-temperature-vulcanized silicone rubber have good elasticity, process especially can not be damaged in compacting process; And it is low to have producting process difficulty, conductor gap is little, it is large to press coefficient, and tightness is large, can reduce kelvin effect, improve the advantages such as ampacity.

Description

A kind of single core layer-stepping milliken conductor

Technical field

The utility model relates to cable conductor field, specifically a kind of single core layer-stepping milliken conductor.

Background technology

Along with the further quickening of the quick growth of China's economic and industrialization, Development of China's Urbanization, day by day improve the construction requirements of the infrastructure such as urban distribution network, city, developed regions and provincial capital require that urban central zone uses underground power cable electric energy transmitting one after another.Meanwhile, electric power is prerequisite and the basis of the national economic development, and along with the fast development of national economy, electricity needs increases severely, and net capacity increases suddenly, and power of motor increases, and electric power facility develops towards Large Copacity (high voltage, big current, high frequency) transmission direction; In order to improve the ampacity of cable, usually adopt the way increasing cross-sectional area of conductor.

The D.C. resistance of conductor is an important parameter of examination cable electrical property.But for exchanging the electric cable with large cross-section of transmission, due to the existence of kelvin effect, current density in conductor is not be uniformly distributed, but reduce gradually to center along cable conductor is radial on surface, the ampacity in conductor is caused to be not increase with cable conductor cross section and increase in direct ratio, but when conductor diameter increases to a certain degree, kelvin effect is serious, conductor in alternating electromotive force circuit is caused to produce loss and the effective resistance that generates heat and AC resistance obviously can be greater than its D.C. resistance, external diameter is larger, kelvin effect is more obvious, the ratio causing AC resistance to increase is also larger, depend merely on increasing section and also just lose its practicality and economy.

In order to alleviate the conductor AC resistance increase because kelvin effect causes to greatest extent, effectively reduce the loss heating of conductor, increase the ampacity of conductor, people have to large size conductor to be carried out in a different manner division processing becomes the conductor be made up of the independent sector of several mutually insulated, the overall dimension of each part obviously reduces, to reach the object reducing AC resistance.Often power cable with cross-linked polyethylene insulation copper core conductor is made milliken conductor in power cable industry, generally there are several structures such as four segmentations, five segmentations, six segmentations and seven segmentations, split share block also has the shapes such as fan-shaped and corrugated, has the insulation crimped paper of being kept apart by each stock block between stock block.By big section copper core wire is broken the whole up into parts, original copper core sectional uniform is divided into the stock block that five mutually isolated, thus the adverse effect of " kelvin effect " and " approach effect " is dropped to bottom line, substantially increase the transmission capacity of wire.But no matter be fan-shaped or corrugated milliken conductor, producting process difficulty is large, and the characteristic requirements of moulds of industrial equipment, equipment is high.Power cable often wants conductor to adopt compact conductor, to improve the activity coefficient of wire, reduced outside diameter, reduces gap between conductor, prevents moisture from infiltrating, and makes to connect between conductor tightr, avoids and loosen some caused problems.Contact-making surface increases electric conductivity, and to strengthen the heating resistor avoiding loose contact to cause large etc.; And sector conductor, corrugated conductor stock block to be fan-shaped, corrugated press, the shape of every layer is different, and when stock block cross section is excessive, the difficulty of pressing increases.Insulating paper between conductor stock block can not bear distortion, and adding man-hour conductor must become the insulated wire having pretwist by first pretwist shaping bag again paper, then goes to gather.Each sector conductor stock block will keep prototype, can not bear the impact that set is reversed, also will adopt pretwist conductor.Pretwist conductor because existing pretwist lay, therefore is easy to synthesis on set is shaped, but relative tightness also can be caused not good enough.When twisted wire pretwist must lay suitably and accurately and evenly, otherwise to occur in the set shaping unfavorable condition that has been bound to, and loose, displacement, displacement are also the problems often had.

Have in prior art and be affixed by insulation to outside every root single line, play object mutually isolated between single line, as formed CuO film in the oxidation of copper single wire surface, single bare copper wire enamelled wire replaces, the mode complex manufacturing of this single line isolation, when electric cable accessories is installed, conductor intractability is larger; Stranded, press in forming process, the separator of single wire surface easily breaks.

Prior art also has the mode adopting layer-stepping segmentation, as every layer stranded complete after overlapping wrapped one deck insulating paper, make between every layer of stranded conductor, to carry out isolation segmentation, but the mode of lapped insulation paper, make all pole out-of-flatnesses of every layer of conductive surface, add conductor gap, press insulating paper also very easily breakage under the effect of compaction forces in forming process, thus lose the effect of isolation segmentation.

Utility model content

The utility model, in order to solve problems of the prior art, provides a kind of producting process difficulty low, and conductor gap is little, it is large to press coefficient, and tightness is large, can reduce kelvin effect, improve the layer-stepping milliken conductor of ampacity.

One described in the utility model single core layer-stepping milliken conductor, this conductor structure is combined by multilayer single line; Comprise center single line layer, the first single line layer, the second single line layer, the 3rd single line layer from inside to outside, outside every layer of single line layer, be equipped with sulphurated siliastic layer.

Further improvement, described center single line layer is circular single line.

Further improvement, described first single line layer, the second single line layer and the 3rd single line layer are Z-type single line or tile-type single line, and center can be hollow-core construction, better can utilize cross-sectional area of conductor.

Further improvement, described sulphurated siliastic layer adopts semiconductive single-component room-temperature-vulsilicone silicone rubber or two-component room-temperature-vulcanized silicone rubber.

The beneficial effects of the utility model are: compared with prior art, the utility model adopts layer-stepping single line structure, and single-component room-temperature-vulsilicone silicone rubber or two-component room-temperature-vulcanized silicone rubber is coated with on every layer of single line, make, outside single line layer, there is insulating barrier, every layer of single line layer is effectively split isolation, make every layer of single line form independently stock block, kelvin effect can be reduced, improve ampacity; The silicone rubber insulation material of coating makes fully to fill between conductor gap, and single-component room-temperature-vulsilicone silicone rubber or two-component room-temperature-vulcanized silicone rubber have good elasticity, process especially can not be damaged in compacting process; The mode of coating can be carried out in stranded process simultaneously, and not needing increases technological process, and production technology is simple, solves the milliken conductor processing technology such as sector element, corrugated type stock block and requires the problem high, difficulty is large.

Accompanying drawing explanation

The structural representation of Fig. 1 to be first, second and third single line layer of the utility model be Z-type single line;

The structural representation of Fig. 2 to be first and second single line layer of the utility model be tile-type single line;

Fig. 3 to be the utility model first single line layer be tile-type single line and the second single line layer be Z-type single line structural representation.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described in further detail.

One list core layer-stepping milliken conductor as shown in Figure 1, this conductor comprises center single line layer 1, first single line layer 2, second single line layer 3, the 3rd single line layer 4 from inside to outside, the sulphurated siliastic layer 5 adopting semiconductive single-component room-temperature-vulsilicone silicone rubber or two-component room-temperature-vulcanized silicone rubber is equipped with outside every layer of single line layer, sulphurated siliastic has good elasticity, process especially can not be damaged in compacting process; Described center single line layer 1 is circular single line; The first described single line layer 2, second single line layer 3 and the 3rd single line layer 4 are Z-type single line.

As shown in Figure 2, be with Fig. 1 difference: compared to Figure 1 overall structure, has lacked the sulphurated siliastic layer 5 outside one deck the 3rd single line layer 3 and the 3rd single line layer 4, its first single line layer 2 and the second single line layer 3 are tile-type single line.

As shown in Figure 3, be with Fig. 1 difference: compared to Figure 1, sulphurated siliastic layer 5, the first single line layer 2 lacked outside one deck the 3rd single line layer 3 and the 3rd single line layer 4 is tile-type single line to overall structure, and the second single line 3 is Z-type single line.

Principle of the present utility model is:

Main improvement of the present utility model is to adopt layer-stepping difformity single line structure, and single-component room-temperature-vulsilicone silicone rubber or two-component room-temperature-vulcanized silicone rubber is coated with on every layer of single line, make, outside single line layer, there is insulating barrier, every layer of single line layer is effectively split isolation, make every layer of single line form independently stock block, kelvin effect can be reduced, improve ampacity; The silicone rubber insulation material of coating makes fully to fill between conductor gap, reduces conductor gap, and single-component room-temperature-vulsilicone silicone rubber or two-component room-temperature-vulcanized silicone rubber have good elasticity, process especially can not be damaged in compacting process; The mode of coating can be carried out in stranded process simultaneously, and not needing increases technological process, and production technology is simple, solves the milliken conductor processing technology such as sector element, corrugated type stock block and requires the problem high, difficulty is large.

The utility model embody rule approach is a lot; the above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model principle; can also make some improvement, these improvement also should be considered as protection range of the present utility model.

Claims (3)

1. a single core layer-stepping milliken conductor, is characterized in that: this conductor structure is combined by multilayer single line; Comprise center single line layer (1), the first single line layer (2), the second single line layer (3), the 3rd single line layer (4) from inside to outside, outside every layer of single line layer, be equipped with sulphurated siliastic layer (5).

2. single core layer-stepping milliken conductor according to claim 1, is characterized in that: described center single line layer (1) is circular single line.

3. single core layer-stepping milliken conductor according to claim 1, is characterized in that: the first described single line layer (2), the second single line layer (3) and the 3rd single line layer (4) are Z-type single line or tile-type single line.