Production method for cabling large-section split conductor

Abstract

The invention relates to the technical field of cable preparation, in particular to a production method for cabling a large-section split conductor. The production method comprises the steps of arranging five positioning wire pressing wheels on a wire doubling plate before a split strand block enters a wire doubling die, and adjusting the angle difference of the relative positions of the five positioning wire pressing wheels to be 72 degrees so as to ensure that the five strand blocks are merged to achieve 360 degrees after cabling. The method specifically comprises the steps that five positioning line pressing wheels on a doubling template are adjusted, sharp corners of triangular wheels of the five line pressing wheels are concentric, the center points of the five positioning line pressing wheels completely coincide, and a phaser on each positioning line pressing wheel is adjusted to a zero position and locked after adjustment is completed. By using the method to produce a split conductor cable, the quality problems that the roundness of the conductor cable is unstable, dislocation, snakelike shape and the like are easy to occur are effectively avoided, so that the quality problem that the core shift degree of the insulating layer of the large-section split conductor cable is unqualified due to the quality problem of the conductor is solved.

Description

technical field [0001] The invention relates to the technical field of cable preparation, in particular to a production method for forming a cable with a large cross-section divided conductor. Background technique [0002] With the development of social economy and the continuous growth of electricity demand, the urban power transmission system is gradually developing from overhead lines to power cables. Power cables are gradually developing to higher voltage levels and larger transmission capacity, and the requirements for cable conductor cross-sections are also small. The cross-section circular conductor is transformed into a large cross-section split conductor. Large-section segmented conductor manufacturing technology is the core technology of major companies. Solving the problems of poor quality stability, unstable roundness, and serpentine bending of conductors in the manufacture of large-section segmented conductors is an urgent project that needs to be tackled. [0...

AI Technical Summary

Problems solved by technology

[0004] 1) The production operation steps are cumbersome and the expected effect cannot be achieved. After the 5 strands are placed on the pay-off cradle, the production personnel need to measure the pitch of the strands on each cradle with a meter ruler before entering the parallel mold. Manually control the rotating pay-off cradle to adjust the pre-twisted pitch of the strands to the target value. During the adjustment process of each strand, repeated measurements, adjustments, and measurements are required. The process is cumbersome and the measurement error is large. 5 strands are pre-twisted. The adjustment of the pitch is heavy, and it is very easy to have inconsistent deviations, which will cause great uncertainty to the stability of the quality of the strands after they are plyed into cables.

[0005] 2) The pay-off tension of the 5 pay-off cradles is controlled by the pneumatic brake disc. The wear consistency of the brake pads on the brake disc is usually not synchronized, resulting in a large difference in friction force, so that the force on the 5 strands is uneven during the cable production process. , the internal stress of the 5 strands of the conductor after cabling is not uniform, causing the conductor to appear serpentine

[0006] 3) Inconsistent pre-twisting or uneven tension of the five strands will lead to periodic dislocation of one or more strands, which will directly affect the roundness of the conductor after cable formation. The subsequent process after cable formation is the key process of cable manufacturing. During the production process, problems such as dislocation of strands, serpentine shape, etc. will lead to unstable eccentricity of the insulating layer, which will seriously affect the smoothness of the interface between the inner shielding layer and the insulating layer. The eccentricity of the insulating layer is an important performance index of the product. The smoothness of the interface between the inner shield and the insulating layer directly affects the electrical performance of the product