Calculating method for dosage of extruded outer sheath of corrugated aluminum-sheathed power cable

Abstract

The invention discloses a calculating method for the dosage of an extruded outer sheath of a corrugated aluminum-sheathed power cable. The extruded outer sheath of the corrugated aluminum-sheathed power cable comprises an extruded outer sheath body, the inner wall of the extruded outer sheath body is corrugated along the axial direction, and the extruded outer sheath body is composed of a circular ring body and a plurality of bumps arranged on the inner wall of the circular ring body; the calculating formula for the material dosage of the extruded outer sheath is as follows, W=[S1+S2 t].p, wherein S1 is the area of the cross section of the circular ring body, and the unit is mm2; S2 is the area of the longitudinal section of one bump, and the unit is mm2; t is a corrugate coefficient; p is the material density, and the unit is g / cm3; W is the material dosage, and the unit is kg / km. The calculating method for the dosage of the extruded outer sheath of the corrugated aluminum-sheathed power cable is capable of precisely calculating the dosage of the extruded outer sheath of the corrugated aluminum-sheathed power cable.

Description

technical field [0001] The invention belongs to power cables with corrugated aluminum sheaths, in particular to a method for calculating the amount of extruded outer sheaths of power cables with corrugated aluminum sheaths. Background technique [0002] With the continuous expansion of the power grid, the power cable is the main carrier for the transmission of electric energy, and its laying volume is increasing year by year. In increasingly complex and diverse laying environments, the total length of corrugated aluminum sheathed power cables is also increasing every year due to their good mechanical properties and excellent bending ability. like figure 1 As shown, the existing corrugated aluminum-sheathed power cable includes a conductor 1, a conductor shielding layer 2, an insulating layer 3, an insulating shielding layer 4, a buffer water-blocking layer 5, a corrugated aluminum sheath 6 and an extruded outer sheath arranged sequentially from the inside to the outside. s...

AI Technical Summary

Problems solved by technology

The actual structure of the extruded outer sheath of the corrugated aluminum sheathed power cable is not circular; the result calculated by method 2 is more accurate than that calculated by method 1, but the embedded coefficient needs long-term exploration and summary, and there are also estimation elements, so The above two calculation methods cannot accurately calculate the amount of extruded outer sheath of wrinkled aluminum sheathed power cables

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