Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Double-insulated cable

A double-layer insulation, cable technology, applied in the direction of insulated cables, insulated conductors, organic insulators, etc., can solve the problems of high accident rate, short circuit, flame retardant performance, electrical performance and radiation resistance performance can not be satisfied at the same time.

Inactive Publication Date: 2009-10-14
CHANGZHOU BAYI CABLE
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The flame retardant performance, electrical performance and radiation resistance performance of cables with conventional single insulation layer structure cannot meet the above requirements at the same time
Because when this kind of cable is used in nuclear facilities, it is easy to cause short circuit and the accident rate is high.
And it is not resistant to radiation, and its lifespan is less than 40 years

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Double-insulated cable

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0027] Double insulated cables, see figure 1 , there is an insulating layer inner layer 2 and an insulating layer outer layer 3 outside the conductive wire core 1. The inner and outer layers of the insulating layer are tightly bonded. The insulating inner layer 2 is made of low-smoke, halogen-free cross-linked polyethylene insulating material, and the insulating outer layer 3 is made of low-smoke, halogen-free, flame-retardant cross-linked polyolefin insulating material. The thickness of the inner layer 2 of the insulating layer is 0.15 mm, and the thickness of the outer layer 3 of the insulating layer is 0.45 mm.

[0028] The properties of inner and outer layer materials meet the following requirements:

[0029] Life expectancy ≥ 60 years;

[0030] Co with a dose of 25 Mrad 60 Radiation resistance;

[0031] Meet NES713 requirements, toxicity index ≤ 2.5;

[0032] Aging at 135±2℃ for 240 hours.

[0033] In addition, the insulation volume resistivity of the inner layer m...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
electrical resistivityaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to the field of insulated cable fabrication, in particular to a double-insulated cable which is provided with a conductive core, wherein the conductive core is externally provided with an insulated layer which adopts a double-layer structure of an internal layer and an external layer, the internal layer is made of low-smoke and zero-halogen crosslinked polyethylene insulated material, and the external layer is made of low-smoke and zero-halogen flame-retardant crosslinked polyolefine insulated material. The cable insulated layer produced by the method can meet the requirements of a civil nuclear facility project on fire resistance, electric property, mechanical property, irradiation resistance and long service life property.

Description

Technical field: [0001] The invention relates to the field of cables, in particular to cables applied to civil nuclear facility projects. Background technique: [0002] Civilian nuclear facility projects (including nuclear power plants, nuclear test reactors, etc.) put forward high performance requirements for cable insulation, as follows: [0003] 1. When the rated or maximum operating temperature of the cable is 90°C, the normal service life of the cable is more than 60 years. [0004] 2. The insulating layer has high flame retardant performance, passing the vertical burning requirement of a single insulated core of IEC 60332-1. Requirements after burning: the unburned distance is greater than 50mm, and the drippings do not ignite the cotton. [0005] 3. The insulating layer has high mechanical properties. The minimum tensile strength before aging is 9.0MPa, and the minimum elongation at break before aging is 200%. After aging in an oven at 135±3°C and 240h, the tensile ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/02H01B7/295H01B3/44H01B7/00
Inventor 周叙元朱峰洪启付
Owner CHANGZHOU BAYI CABLE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com