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A modified polypropylene insulated multi-core cable with high ampacity

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

Active Publication Date: 2022-03-01
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 multi-core cable

Method used

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  • A modified polypropylene insulated multi-core cable with high ampacity
  • A modified polypropylene insulated multi-core cable with high ampacity
  • A modified polypropylene insulated multi-core cable with high ampacity

Examples

Experimental program
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Effect test

Embodiment 1

[0058] a kind of like figure 1 Shown is a high ampacity modified polypropylene insulated multi-core cable comprising:

[0059] Core wire 1 group, tape layer 2, inner sheath 3, armor layer 5 and outer sheath 6 arranged in sequence from inside to outside;

[0060] The core wire group 1 is composed of several core wires 1. In this embodiment, the core wire group 1 is composed of three core wires 1, and the three core wires 1 are as follows: figure 1 As shown, it is evenly arranged in a triangular distribution along the circumferential direction of the cable axis, and a filler 4 is provided in the gap of the core wire group 1, and the filler 4 is a filler rope;

[0061] The core wire 1 includes a conductor 101, an inner shielding layer 102, a modified insulating layer 103, an insulating shielding layer 104 and a metal shielding layer 105 from the inside to the outside;

[0062] The conductor 101 is a common cable conductor 101, which can be stranded copper, single copper, copper...

Embodiment 2

[0087] 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;

[0088] The above-mentioned Si-C-Al composite filler is prepared by the following process:

[0089] 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, in particular to a modified polypropylene insulated multi-core cable with high ampacity. It includes: a core wire group, the core wire group is composed of at least two core wires to realize power transmission; an outer sheath is wrapped outside the armor layer to protect the core wire group and the armor layer; wherein: the The core wire includes a conductor and a modified insulating layer covering the conductor; 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 present invention replaces cross-linked polyethylene with modified polypropylene, which reduces the cost and improves the quality of the insulating layer; the current carrying capacity and the actual withstand working temperature of the cable are significantly improved; the modified polypropylene can be recycled and reused, making it more environmentally friendly; The structural stability of the overall cable is higher, and the ability to resist twisting is stronger; the cable has good heat conduction and heat dissipation performance after doping Si‑C‑Al.

Description

technical field [0001] The invention belongs to the field of cables, in particular to a modified polypropylene insulated multi-core cable with high ampacity. 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 high cost. So the cable industry has been looking fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B7/17H01B7/42H01B3/44H01B7/02
CPCH01B3/441H01B7/17H01B7/02H01B7/428
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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