High-current-carrying-capacity modified polypropylene insulated cable and modified polypropylene insulating material used by same

A technology of insulated cables and polypropylene, applied in the directions of insulated cables, insulators, insulated conductors, etc., can solve problems such as hidden safety hazards, limited performance, environmental pollution, etc., and achieve the effects of improving quality, high structural stability, and reducing costs.

Active Publication Date: 2020-09-18
浙江万马股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of using a large number of cross-linked polyethylene with high cost and limited performance in the existing crimping cables, causing environmental pollution, and there are certain safety hazards in the actual use process, the present invention provides a high-carrying-capacity Modified polypropylene insulated cable, and a modified polypropylene insulating material

Method used

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  • High-current-carrying-capacity modified polypropylene insulated cable and modified polypropylene insulating material used by same
  • High-current-carrying-capacity modified polypropylene insulated cable and modified polypropylene insulating material used by same
  • High-current-carrying-capacity modified polypropylene insulated cable and modified polypropylene insulating material used by same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] a kind of like figure 1 High ampacity modified polypropylene insulated cables shown, which include:

[0055] Conductor 1, inner shielding layer 2, modified insulating layer 3, insulating shielding layer 4, metal shielding layer 5, tape layer 6, inner sheath 7, armoring layer 8 and outer sheath 9 arranged in sequence from inside to outside ;

[0056] The conductor 1 is a common cable conductor 1, which can be stranded copper, single copper, copper-plated after twisting, copper-clad aluminum, etc.;

[0057] The inner shielding layer 2 is tightly wrapped on the outer surface of the conductor 1 and is prepared from a common shielding material, preferably a polypropylene shielding material. The polypropylene shielding material is a thermoplastic polypropylene semiconductor 1 electrical shielding material, and the inner shielding layer 2 The setting of the conductor 1 uniforms the electric field on the outer surface of the conductor 1, and avoids the problem of partial disc...

Embodiment 2

[0080] In the ethylene-propylene rubber copolymer, Si-C-Al composite filler is further doped, and the addition amount of Si-C-Al composite filler is 12 to 15wt% of the ethylene-propylene rubber copolymer. The doping of composite fillers can further improve the thermal conductivity and heat dissipation performance of the modified insulating layer, and to a certain extent improve its insulation and electrical breakdown resistance;

[0081] The above-mentioned Si-C-Al composite filler is prepared by the following process:

[0082] Mix coke powder, aluminum powder and elemental silicon powder into a mixed powder, and control the mass ratio of coke powder, aluminum powder and elemental silicon powder in the mixed powder to 1: (1.9~2.1): (6.9~7.1), this implementation The mass ratio of coke powder, aluminum powder and elemental silicon powder used in the example is 1:2:7. After the above-mentioned mixture is uniformly mixed into a mixed powder, it is pressed to form a block material...

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Abstract

The invention belongs to the field of cables, and particularly relates to a high-current-carrying-capacity modified polypropylene insulated cable and a modified polypropylene insulating material usedby the same. The cable comprises a conductor, a modified insulating layer, an armor layer and an outer sheath which are sequentially arranged from inside to outside, wherein the outer sheath is a flame-retardant outer sheath. The modified insulating layer is a modified polypropylene insulating layer; and the modified polypropylene insulating layer is prepared from a modified polypropylene insulating material. The modified polypropylene insulating material is prepared from a polypropylene block co-polyethylene monomer, wherein the content of the ethylene monomer is 2-3wt% of that of the polypropylene. According to the invention, the modified polypropylene replaces cross-linked polyethylene, so the cost is reduced, and the quality of the insulating layer is improved; the current-carrying capacity and the actual bearable working temperature of the cable are obviously improved; and the modified polypropylene can be recycled, and is greener and more environment-friendly.

Description

technical field [0001] The invention belongs to the field of cables, in particular to a modified polypropylene insulated cable with high ampacity and the modified polypropylene insulating material used therein. Background technique [0002] At this stage, most medium-voltage cables use cross-linked polyethylene as the insulating material. Since the material is made of polyethylene as the base material, the process is cross-linked through chemical reactions to form cross-linked polyethylene, which will cause the insulating layer to be damaged during cross-linking processing. Toxic substances are produced during the process, which brings difficulties to its later recycling and environmental protection; at the same time, XLPE cables will still have insulation hazards such as "water branches" during operation. For cities with abundant groundwater and high cable coverage Power supply reliability has a certain impact. In addition, cross-linked polyethylene also has the problem of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/17H01B3/44H01B7/02H01B7/04H01B7/295H01B7/42
CPCH01B3/441H01B7/02H01B7/295H01B7/04H01B7/428H01B7/17
Inventor 李金堂王福志刘焕新孟益标余德平梁增显王玲红
Owner 浙江万马股份有限公司
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