Thermal shrinkable flexible conductive tube and production process thereof

A flexible conductive and production process technology, applied in conductors, circuits, electrical components, etc., can solve the problems of low elongation, waste of manpower, material and financial resources, long winding time, etc., to achieve enhanced elongation and flexibility, The effect of increasing the extrusion rate and accelerating the crystallization rate

Active Publication Date: 2011-11-23
山东七星电气科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of power grid transformation and construction, my country adopts rectangular power supply busbar as the main facility for electrical equipment connection, but rectangular busbar has obvious shortcomings: obvious skin effect, serious eddy current loss, and the loss accounts for about 80% of the entire line loss. Account for 20% of the loss of the entire substation system
The composite pipe busbars produced by some foreign companies are directly laminated and cured on copper or aluminum pipes with epoxy resin, and there is no conductive non-metallic material as a buffer layer, which will cause changes in the cable due to cold and heat cycles during operation. There is a gap between the outer wall of the metal tube and the resin insulation layer, which causes an increase in partial discharge, a decrease in electrical performance, and eventually leads to breakdown
Chinese manufacturers adopt the method of wrapping semi-conductive tape as a buffer layer to continuously wrap the semi-conductive tape outside the metal tube conductor. This method requires a long winding time and wastes a lot of manpower, material and financial resources, and because it is artificial Winding the semi-conductive tape will lead to spiral patterns on the winding layer, uneven surface, resulting in uneven electric field distribution, unstable long-term operation, and unstable partial discharge performance
At present, some manufacturers use conductive tubes to cover the conductors, so that manual winding is not required, and the conductive tubes are evenly wound. However, the production process of conductive tubes is complicated and difficult to implement, and the electrical properties of the prepared conductive tubes are not good at high temperature and high frequency. Excellent, low elongation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The EVA hot melt adhesive and PET are preheated and melted at a mass ratio of 2:1 to obtain a high polymer, and the high polymer is mixed with special conductive carbon black, white oil, PE wax, phosphate ester, sodium benzoate, β-(3, 5-di-tert-butyl-4-hydroxyphenyl) n-octadecyl propionate enters the internal mixer through the feeder in the ratio of 50:30:5:10:5:1:2 in parts by mass , mixed together in the internal mixer; put the uniformly mixed material into the open mixer to refine and mold it into a molten material, and then press molded into a sheet-like belt, enter the plastic granulator, and use the high-pressure friction continuous heating system, Automatic heating production, cut into particles after screw extrusion, granulation temperature is 100°C; sieve the particles that have passed through the fluidized bed, and add them to the chaotic mixing type low-energy extruder that has reached the drying requirements, and extrude through The pressure system is plasti...

Embodiment 2

[0027] Compared with Example 1, the high polymer in the present example is mixed with special conductive carbon black, white oil, PE wax, phosphoric acid ester, sodium benzoate, β-(3,5-di-tert-butyl-4-hydroxyphenyl ) n-octadecyl propionate is mixed according to the ratio of 60:40:10:5::7:3:1 in parts by mass; the granulation temperature is 130°C; the extruding temperature is 130°C; , The radiation measurement is 110KGY; for tube expansion, the expansion temperature is 125°C. The rest of the process and equipment used are the same as those in Embodiment 1, and will not be described again.

Embodiment 3

[0029] Compared with Example 1, the high polymer in the present example is mixed with special conductive carbon black, white oil, PE wax, phosphoric acid ester, sodium benzoate, β-(3,5-di-tert-butyl-4-hydroxyphenyl ) n-octadecyl propionate is mixed according to the ratio of 55:35:8:7:10:5:1.5 in parts by mass, the granulation temperature is 160°C; the extrusion temperature is 150°C; when irradiating, The radiation measurement is 125KGY; for tube expansion, the expansion temperature is 150°C. The rest of the process and equipment used are the same as those in Embodiment 1, and will not be described again.

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PUM

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Abstract

The invention discloses a thermal shrinkable flexible conductive tube and a production process thereof, belongs to the technical field of cables and in particular relates to a tube bus matched product. According to a formula, the thermal shrinkable conductive tube is characterized by comprising the following raw materials in part by mass: 50 to 60 parts of high polymer, 30 to 40 parts of conductive filler, 5 to 10 parts of white oil, 5 to 10 parts of polyurethane (PE) wax, 5 to 10 parts of phosphate, 1 to 5 parts of sodium benzoate and 1 to 2 parts of antioxidant. The high polymer obtained bypreheating, melting and mixing an ethylene vinyl acetate (EVA) hot melt adhesive and polyethylene terephthalate (PET) has a smooth and glossy surface, excellent electric insulativity and a higher electrical property at a high temperature and high frequency. Special conductive carbon black serves as the conductive filler, so the conductive filler has higher conductive performance due to a meshed structure; and when the conductive filler is mixed with the other raw materials, the conductive performance of the thermal shrinkable flexible conductive tube is improved.

Description

technical field [0001] The invention belongs to the technical field of electric cables, and in particular relates to a matching product of a pipe busbar. Background technique [0002] With the development of the economy, my country pays more and more attention to the power supply quality and guarantee ability of the power grid. In the process of power grid transformation and construction, my country adopts rectangular power supply busbar as the main facility for electrical equipment connection, but rectangular busbar has obvious shortcomings: obvious skin effect, serious eddy current loss, and the loss accounts for about 80% of the entire line loss. It accounts for 20% of the loss of the whole substation system. The composite pipe busbars produced by some foreign companies are directly laminated and cured on copper or aluminum pipes with epoxy resin, and there is no conductive non-metallic material as a buffer layer, which will cause changes in the cable due to cold and heat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B5/16H01B13/00
Inventor 孙晓维
Owner 山东七星电气科技发展有限公司
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