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Waterproof power cable and its manufacturing method

A technology for power cables and manufacturing methods, applied to power cables with shielding layers/conductive layers, cable/conductor manufacturing, circuits, etc., which can solve the problems of increased cable costs, expensive water-blocking ropes, and unstable longitudinal water-blocking performance of cables and other problems, to achieve the effect of increased cost, excellent water resistance and reduced production cost

Inactive Publication Date: 2007-11-14
SHANGHAI YALONG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to make the cable waterproof in the traditional waterproof cable, a large amount of water-blocking ropes are filled in the gaps of the cable. The water-blocking rope is expensive. This structure not only greatly increases the cost of the cable, but also Longitudinal water blocking performance is unstable

Method used

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  • Waterproof power cable and its manufacturing method

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Embodiment Construction

[0032] Through the following examples, the substantive characteristics and remarkable progress of the present invention are further illustrated, but the present invention is by no means limited to the examples.

[0033] The waterproof power cable described in this embodiment is shown in Figure 1. It is composed of three single-core water-blocking cables twisted into cables. Each single-core water-blocking cable is composed of conductors, water-blocking powder, conductor shielding layer, Insulation layer, insulating layer shielding layer, semiconductor water blocking tape I, metal shielding layer, semiconductor water blocking tape II, water blocking layer and outer protective layer.

[0034] 1. Conductor:

[0035] Oxygen-free copper wire is used, which meets the requirements for the structure of Class 2 conductors specified in the GB / T3956 standard. The conductor adopts a layered compact structure, and the surface of each layer needs to be coated with water-blocking powder to ...

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Abstract

This invention involves a waterproof electrical cables, its features are: óƒ waterproof referred to by the three power cables cable cutter water blocking synthesis of single-core cables; ó each from the single-core cables, water blocking, followed by the conductor, water blocking layer powder , shielding layer, insulating layer, insulated shielding layer, with water blocking I semiconductor, metal shielding layer, with water blocking II semiconductor, water blocking layer and the outer sheathing layer composition. Oxygen-free copper conductors in the round pressed into¢—‘ surface water blocking coated powder, water blocking zone I and II packages for vertical band of aluminum-plastic composites at the same time squeezing packets polyethylene. Power cable provided with GB / T12706.2 the relevant requirements, and the aluminum-plastic composites with polyethylene, and stripping of the sheath of not less than 1.2 N / mm, charging to 50-100 Pa after dry air or nitrogen balance six hours, one end of the cable, not the air pressure drop.

Description

technical field [0001] The invention relates to a waterproof power cable and a manufacturing method, belonging to the field of cables. Background technique [0002] Since the discovery of cross-linked polyethylene (XLPE) insulation water tree aging in 1967, it has been confirmed as one of the main phenomena of XLPE cable aging. [0003] Although the mechanism of water tree branches and how to cause damage is not fully understood yet, a large number of experimental data show that water tree branches can cause local stress increase and may become the birthplace of electric tree branches. At high temperatures, significant oxidation may occur in the water branches, resulting in increased water absorption, increased electrical conductivity, and eventually thermal breakdown; even at low temperatures, the water branches are oxidized or transformed into electrical branches for a long time, which will also cause insulation. destroy. Especially when the cable is soaked in water for ...

Claims

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Application Information

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IPC IPC(8): H01B9/02H01B13/02
Inventor 计初喜鲁邦秀
Owner SHANGHAI YALONG IND
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