Production process of long-stator cable for magnetic levitation rail transient

Abstract

The invention provides a production process of a long-stator cable for magnetic levitation rail transit. The production process comprises the steps of S1, drawing a central line and single-core conductors; S2, rolling and stranding the center line and the single-core conductors; S3, drawing Z-shaped molded line single wires or S-shaped molded line single wires; S4, integrally stranding the conductor; S5, annealing the conductor; S5, co-extruding a conductor shielding layer, an insulating layer and an insulating shielding layer outside the conductor; and S6, extruding a sheath outside the insulation shielding layer. According to the invention, the production speed is improved, the energy consumption is saved, and the filling coefficient of the conductor is ensured to reach 0.95 or above.

Description

technical field [0001] The invention relates to a production process of a long stator cable for maglev rail transit, and belongs to the field of cable production. Background technique [0002] At present, there are three types of conductors designed for long stator cables for maglev rail transit: [0003] 1. The core wire is twisted with fan-shaped aluminum wire, and the outer layer is twisted with aluminum wire. [0004] 2. The core wire is twisted with 7 round aluminum wires, and the outer layer is twisted with aluminum-shaped wires. [0005] 3. The core wire is twisted with fan-shaped aluminum wire, and the outer layer is twisted with trapezoidal wire. [0006] French Nexans Cable and Shanghai Electric Cable Research Institute adopt the first and second structures, and Far East Cable Co., Ltd. adopts the third structure. [0007] The currently known single-core or multi-core aluminum conductors or aluminum alloy conductors are usually twisted and pressed into fan-shape...

AI Technical Summary

Problems solved by technology

[0009] During the use of these cables, there are induction currents, capacitive currents and leakage currents that are conducted along the axial direction of the cables, which will increase the ground potential of the cable shielding layer and easily cause safety accidents

[0010] In addition, the current production process of cable conductors, including CN102403051A, etc., is to design a wire drawing die to draw the wire conductor through a large drawing machine, and then twist the conductor produced by a cage stranding machine or a frame stranding machine. The problem is that the production efficiency of shaped wire conductor drawing is low and the energy consumption is large. The drawing speed of ordinary round wire can reach 24m / s, and the drawing speed of shaped wire does not exceed 12m / s.

Images