Mining cable with water-blocking isolation layer

An isolation layer and water-blocking technology, applied in the direction of power cables with shielding layer/conductive layer, bendable cables, insulated cables, etc., can solve the problem of cracking of cable sheath, unsuitable construction and laying in winter, unusable cables, etc. problems, achieve excellent cold resistance and improve radial water resistance

Inactive Publication Date: 2018-03-06
何木栋
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The standard clearly stipulates that the low temperature performance test temperature of PVC insulation and sheath is minus 15°C, and the ambient temperature of PVC insulated or PVC sheathed cables should not be lower than 0°C during installation. The standard plastic insulated wires and cabl

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
  • Mining cable with water-blocking isolation layer

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0010] Such as figure 1 As shown, a coal mine cable with a water-blocking isolation layer has a cross-sectional area of ​​240mm from the inside to the outside 2 The core 1, the conductor shielding layer 2, the insulating layer 3, the insulating shielding layer, the wrapping tape 7 and the outer sheath 11 are formed. The insulating layer 3 is made of cross-linked polyethylene material, and its thickness is not less than 23mm. The insulating shielding layer is composed of a non-metal semiconducting layer 4 and a metal layer 5 from the inside to the outside, wherein the non-metal semiconducting layer 4 is made of extruded cross-linking and bonding semiconducting material, and the metal layer 5 is made of copper. For wire shielding, the surface of the copper wire shielding is provided with reverse-wrapped copper wire or copper tape 6, and the average gap between the windings in the copper wire shielding should not be greater than 4mm.

[0011] A water blocking isolation layer 8 is pr...

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

No PUM Login to view more

Abstract

The invention discloses a mining cable with a water-blocking isolation layer, and the cable consists of a cable core, a conductor shielding layer, an insulating layer, an insulating shielding layer, awrapping tape and an outer sheath from the inside to the outside. The cable is characterized in that the insulating shielding layer is formed by the combination of a nonmetal semiconductive layer anda metal layer from the inside to the outside; the nonmetal semiconductive layer employs an extruded crosslinked sticking-type semiconductive material, and the metal layer employs a copper wire for shielding; the insulating layer is made of a crosslinked polyethylene material or a thermoplastic elastomer material; the outer sheath is a black sheath which is made of a thermoplastic elastomer with the cold resistance of -50 DEG C. The periphery of the wrapping tape is provided with a water-blocking isolation layer, and the periphery of the water-blocking isolation layer is provided with an armored part which is made of a non-ferromagnetic material. Because of the adding of the water-blocking isolation layer, the radial water-blocking performance of the cable is improved.

Description

technical field [0001] The invention relates to a cable, in particular to a cable for coal mines. Background technique [0002] Wires and cables are widely used in metallurgy, mining, construction, petrochemical, aerospace and other projects. Due to the vast territory of our country, the extreme temperature in winter in the northern region can reach minus 45°C. According to the current IEC standard, that is, the national standard GB12706-2008, the plastic insulated power cable is made of cross-linked polyethylene and polyvinyl chloride, and the sheath is polyvinyl chloride. The standard clearly stipulates that the low temperature performance test temperature of PVC insulation and sheath is minus 15°C, and the ambient temperature of PVC insulated or PVC sheathed cables should not be lower than 0°C during installation. The standard plastic insulated wires and cables are not suitable for winter construction and laying in Northeast my country, Inner Mongolia, Tibet and Xinjiang....

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
IPC IPC(8): H01B7/282H01B7/17H01B7/02H01B3/44H01B9/02H01B7/04H01B7/22
CPCY02A30/14H01B7/282H01B3/441H01B7/02H01B7/04H01B7/17H01B7/22H01B9/02
Inventor 何木栋
Owner 何木栋
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products