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Manufacturing method of safety fire-resistant medium and high voltage cables

A technology for medium and high voltage cables and a manufacturing method, which is applied in the manufacture of cables/conductors, power cables with shielding layers/conducting layers, circuits, etc., can solve the problems of not being able to save time for rescue work, too simple structure, and poor fire resistance, etc. Achieve the effect of round shape, enhanced mechanical strength and good bending performance

Active Publication Date: 2013-02-20
SICHUAN MINGXING CABLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this patent are: the structure of the cable itself is too simple, the heat insulation effect is poor, the fire-resistant time is short, and the fire-resistant performance is also poor. Under the damage of the power system by sudden accidents such as fires and natural disasters, it cannot be used for power supply. Rescue efforts buy time

Method used

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  • Manufacturing method of safety fire-resistant medium and high voltage cables
  • Manufacturing method of safety fire-resistant medium and high voltage cables
  • Manufacturing method of safety fire-resistant medium and high voltage cables

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A method for manufacturing a safe fire-resistant medium and high voltage cable, comprising the following steps: material selection → wire drawing → annealing → conductor stranding → co-extrusion and covering of inner shielding layer, insulating layer and outer shielding layer → metal shielding layer setting → phase separation Extrusion of refractory insulation layer→wrapping of first tape layer→cable twisting and wrapping of cabled tape layer→extrusion of oxygen barrier layer→wrapping of refractory insulation layer→wrapping of second tape layer→metal Wrapping of the armor layer→wrapping of the third tape layer→extrusion of the outer sheath layer. The step of extruding the phase-separated refractory isolation layer refers to using a silicone rubber extruder to extrude the vitrified silicone rubber material on the metal shielding layer. On layer 5, the extruded thickness is 2.0 mm; the step of extruding the oxygen barrier layer refers to using an extruding mold on the extr...

Embodiment 2

[0043] A method for manufacturing a safe fire-resistant medium and high voltage cable, comprising the following steps: material selection → wire drawing → annealing → conductor stranding → co-extrusion and covering of inner shielding layer, insulating layer and outer shielding layer → metal shielding layer setting → phase separation Extrusion of refractory insulation layer→wrapping of first tape layer→cable twisting and wrapping of cabled tape layer→extrusion of oxygen barrier layer→wrapping of refractory insulation layer→wrapping of second tape layer→metal Wrapping of the armor layer→wrapping of the third tape layer→extrusion of the outer sheath layer→performance inspection experiment→packaging of the finished product into storage. Silicone rubber material is extruded on the metal shielding layer, and the extruded thickness is 3.0mm; the step of extruding the oxygen barrier layer refers to using an extrusion mold on the extrusion equipment, and using a screw with a compression...

Embodiment 3

[0054] A method for manufacturing a safe fire-resistant medium and high voltage cable, comprising the following steps: material selection → wire drawing → annealing → conductor stranding → co-extrusion and covering of inner shielding layer, insulating layer and outer shielding layer → metal shielding layer setting → phase separation Extrusion of refractory insulation layer→wrapping of first tape layer→cable twisting and wrapping of cabled tape layer→extrusion of oxygen barrier layer→wrapping of refractory insulation layer→wrapping of second tape layer→metal Wrapping of the armor layer→wrapping of the third tape layer→extrusion of the outer sheath layer→performance inspection experiment→packaging of the finished product into storage. Silicone rubber material is extruded on the metal shielding layer, and the extruded thickness is 4.0mm; the step of extruding the oxygen barrier layer refers to using an extruding mold on the extrusion equipment, and using a screw with a compression...

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Abstract

The invention discloses a manufacturing method of safety fire-resistant medium and high voltage cables. The manufacturing method includes steps of selecting, drawing, annealing, conductor stranding, coextruding and covering of inner shield layers, insulating layers and outer shield layers, setting metal shield layers, isolated-phase extruding of fire-resistant isolated layers, lapping of first tape layers, cabling stranding and cabling tape lapping, extruding of oxygen isolating layers, extruding of fire-resistant isolating layers, lapping of second tape layers, lapping of metal armor layers, lapping of third tape layers and extruding of outer sheath layers. The medium and high voltage cables manufactured by the method have good heat insulation effect when laid on buildings, fire resistance of the cables is improved greatly, damages to an electric power system due to accidents such as fires and natural disasters can be delayed, and time can be gained for rescue work.

Description

technical field [0001] The invention relates to the technical field of cable manufacturing, in particular to a method for manufacturing a safe fire-resistant medium and high voltage cable. Background technique [0002] Entering the 21st century, my country's infrastructure has entered a golden age of construction. Today, with the rapid expansion of population and urbanization, in order to save resources, urban construction has to develop towards clustering, scale and high-level development. In key national and civil projects such as stations, airports, subways, nuclear power plants, business hotels, hospitals, shopping malls, residential buildings, etc., in addition to considering their necessary functions and environmental comfort, safety is increasingly on the agenda , Shanghai "11.15" catastrophic fire accident has brought people a very profound warning. As a special cable, fire-resistant cables are used in occasions that require a high safety factor, and have been widel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/24H01B13/26H01B13/00H01B9/02
Inventor 宋强李广元沈卢东盛业武陈光高兰超王冰迪
Owner SICHUAN MINGXING CABLE
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