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Flame-retardant power cable

A power cable, flame-retardant technology, applied in the field of flame-retardant power cables, can solve problems such as uneven tension of wires, uneven thickness of insulation layer, affecting cable insulation, etc., to meet the requirements of increasing convenience and increasing support and protection Performance, the effect of ensuring the safety of use

Active Publication Date: 2021-12-28
辽宁佳义电缆有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to make up for the deficiencies of the existing technology, when the cable is produced in the prior art, the wire is passed through the extrusion hole of the extruder, and at the same time, the extruder melts the insulating particles and extrudes and wraps them around the wire to form a good cable. Protective and insulating properties, but when the wire passes through the extrusion hole, due to the uneven tension and vibration of the wire, the wire appears eccentrically displaced, resulting in uneven thickness of the insulation layer on the outer periphery of the cable after molding, which affects the insulation of the cable. At the same time, when the cable voltage and current load are large, it is easy to break through the thin insulation layer, causing fire hazards. A flame-retardant power cable proposed by the present invention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as Figure 1 to Figure 6 As shown, a flame-retardant power cable according to the present invention includes a conductor 1, a protective layer 11 and an insulating layer 12; a group of semi-circular support rings 13 are equidistantly embedded in the insulating layer 12, and two corresponding positions The support ring 13 forms a complete circle; the two ends of the two support rings 13 are fixedly connected by bayonet pins 14; the inner circumference of the support ring 13 is provided with a group of support frames 15, and one end of the support frame 15 near the protective layer 11 is fixedly connected with an arc Shaped support plate 16, the support plate 16 is against the outer periphery of the protective layer 11; the bayonet pin 14 and the insulating layer 12 are the same thermoplastic material; when working, the cable in the prior art is made by extruding the wire 1 At the same time, the extruder melts the insulating particles and extrudes them and wraps them...

Embodiment 2

[0040] Such as Figure 7 As shown in Comparative Example 1, another embodiment of the present invention is: the outer diameter of the ceramic ball 33 is smaller than the inner diameter of the first hole 31; the outer periphery of the ceramic ball 33 is fixedly connected with an annular sealing ring 37, 37 is bonded to the inner wall of the No. 1 hole 31 through glue that is not resistant to high temperature; through the ceramic ball 33 and the sealing ring 37, the sealing effect on the No. 1 hole 31 is increased, and the accidental overflow of magnesium oxide powder is reduced. At the same time, when the cable load is large, the temperature Raise, and then make the glue fail, increase the efficiency of magnesium oxide powder filling the wire 1 gap to increase the fire performance.

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Abstract

The invention belongs to the technical field of cables, and particularly relates to a flame-retardant power cable. The cable comprises a wire, a protective layer and an insulating layer. A group of semi-annular support rings are embedded in the insulating layer at equal intervals, and two support rings at corresponding positions form a whole circle; the two ends of the two supporting rings are fixedly connected through clamping pins. A set of supporting frames are arranged on the inner periphery of the supporting ring, the ends, close to the protective layer, of the supporting frames are fixedly connected with arc-shaped supporting plates, and the supporting plates abut against the periphery of the protective layer. The clamping pins and the insulating layer are made of the same thermoplastic material. According to the invention, the supporting rings are clamped with each other to support the wire, so the concentricity between the wire and the insulating layer is increased, the thickness uniformity of the insulating layer is improved, the loosening displacement of the supporting rings is reduced, and the supporting and protecting performance of the wire is improved.

Description

technical field [0001] The invention belongs to the technical field of cables, in particular to a flame-retardant power cable. Background technique [0002] Power cables are cable products used to transmit and distribute high-power electric energy in the backbone lines of power systems. The basic structure of power cables consists of four parts: core (conductor), insulating layer, shielding layer and protective layer. [0003] There are also some technical solutions about cables in the prior art. For example, a Chinese patent with application number 2021103303928 discloses a flame-retardant power cable, which includes a cable main body. A filling layer is provided in the middle of the cable main body. The outer wall is provided with carbon fiber layer, airgel felt layer, ethylene propylene copolymer and halogen-free flame-retardant jacket in sequence from the inside to the outside. The middle part of the filling layer is provided with a polyvinyl chloride cylinder, and the o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/02H01B7/18H01B7/28H01B7/295H01B7/40H01B9/02
CPCH01B7/18H01B7/40H01B7/295H01B9/00H01B7/17H01B7/02H01B7/29H01B7/42Y02A30/14
Inventor 丁明亮
Owner 辽宁佳义电缆有限公司