The second type of circular compact conductor structure and its stranding process

Abstract

The invention discloses a second type of circular compacted conductor structure, including: several conductors and monofilaments, the conductors are normally twisted and divided into several conductor layers, and the conductor layers and conductor layers are layered and compacted, and the monofilaments are arranged Between the conductor layers, when the total number of conductors is less than or equal to 19, all monofilaments are twisted in the same direction; when the total number of conductors is more than 19, the outermost monofilaments are twisted in reverse, and the inner monofilaments are twisted in the same direction. To twist. It solves the problem of increasing the filling factor of the conductor and improving the conductivity of the conductor. The flexibility is better than that of the traditional second-class round compact conductor. It has the characteristics of stable structure, simple processing and easy operation.

Description

Technical field [0001] The invention relates to a power cable conductor, in particular to a second-class circular compact conductor structure and its stranding process. Background technique [0002] At present, power cables use Type 2 compact conductors. As the requirements for the transmission of electrical energy are on the rise, the cross-section of the cable conductors also tends to increase, from the maximum cross-section of 800mm in the 1990s 2 , The cross-section of cable conductor has reached 2500mm 2 This creates a contradiction. On the one hand, we hope to transmit more electric energy by increasing the cross section. On the other hand, we don’t want the outer diameter of the cable to increase. The increase in the outer diameter of the cable will increase the consumption of materials and cable laying. The environment in which the cable is used has brought many new requirements and increased difficulties. The best way is to use a tightly compressed conductor, which can fi...

AI Technical Summary

Problems solved by technology

[0004] Using the traditional stranding process, the conductor structure is stable. Since the stranding direction of each layer is opposite, the flexibility of the conductor is relatively poor. During the compaction process of each layer, due to the reverse stranding, the deformation at the intersection of the conductor monofilaments is large. Due to the deformation of the non-intersection point, the deformation of the single wire is irregular, the mechanical stress of the single wire is inconsistent, the degree of metal variation is increased, and the damage to the metal surface is increased, thereby affecting the electrical conductivity of the metal. For the traditional second-class conductor tight Compression conductor stranding process, its compression coefficient can only reach 0.85~0.90, which cannot be improved any more. Excessive compression can only destroy the metal lattice and cause greater conductor extension

[0005] In order to improve the compaction coefficient of conductors, stranded wire conductors are also used in foreign countries. The selection of stranded wire conductors requires prefabricated wires, and the size and shape of each layer of wires are inconsistent, which increases the versatility of the organization. It brings great constraints. In the process of stranding, it is easy to produce problems such as twisting and turning over of the molded wire. In addition, the cross-section of the molded wire is much larger than that of the round monofilament, which affects the flexibility of the conductor.

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