Twisting-resistant and stretching-resistant mobile type cable and preparation method thereof

A mobile and cable technology, which is applied in the field of power cables, can solve problems such as cable core twisting, cable failure, and short service life, and achieve the effects of ensuring deformation margin, prolonging service life, and protecting safe operation

Inactive Publication Date: 2014-04-23
宜昌红旗永进电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of existing rubber insulated and sheathed cables in such occasions frequently results in cable core breakage, twisting of the cable core and wrinkling of the sheath. In the end, the service life of the cable installation is often short and the scheduled time is not reached. The cable fails and is scrapped

Method used

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  • Twisting-resistant and stretching-resistant mobile type cable and preparation method thereof
  • Twisting-resistant and stretching-resistant mobile type cable and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 , 2 Among them, a torsion-resistant and tensile-resistant mobile cable includes a plurality of cable cores containing conductors 1. Specifically, the conductor 1 is surrounded by a conductor isolation zone 2, and the conductor isolation zone 2 is an insulating layer 3. There is an inter-core filler 5 between the cores, an outer core filler 4 is arranged outside the cable core, a cable core isolation belt 6 is arranged outside the outer core filler 4, and a sheath layer is arranged outside the cable core isolation belt 6, and the conductor 1 is composed of strands The wires are formed after being bundled and re-twisted. When the strands used in conductor 1 are re-twisted, the rotation direction of each layer of twisted wires is the same, that is, the bundled direction of each layer of strands is the same as the rotation direction of the twisted wires, and the adjacent layer of strands The direction of re-twisting is opposite. With this structure, the m...

Embodiment 2

[0040] A method for preparing the cable described in Example 1, comprising the steps of:

[0041] 1. When the strands of conductor 1 are bundled, part of them is left-handed, and part of them is right-handed, and the diameter ratio of bundle joints is 16~18;

[0042] 2. When the strands are re-twisted, the directions of the twisted wires of each layer are the same, that is, the bundled direction of the strands is the same as the direction of the twisted strands, and the direction of the adjacent layers of twisted wires is opposite, and the twisted joint diameter is 9~11 , Outer layer 8~9;

[0043] 3. Overlap and wrap a layer of high-temperature polyester tape outside the conductor 1 in the opposite direction to the outer layer;

[0044] 4. Extrude the vulcanized insulating layer 3 to make the cable core, and coat the insulating layer 3 with superfine talcum powder;

[0045] 5. Set the inter-core filling 5 between the cable cores. There are no less than 2 strands of aramid ya...

Embodiment 3

[0055] This example is on the basis of Examples 1 and 2, further preferred examples, such as figure 1 , 2 shown in .

[0056] 1. Material

[0057] Conductor 1 is the sixth kind of soft copper conductor, conductor isolation tape 2 is high-temperature polyester tape, insulation layer 3, core outer filler 4 and inter-core filler 5 are XJ-30B rubber, cable core isolation belt 6 is reinforced non-woven fabric , the inner sheath 7 and the outer sheath 9 are chlorinated polyethylene, and the fiber bundle reinforcement layer 8 is aramid yarn.

[0058] 2. Conductor

[0059] The monofilament meets the requirements of TR type in GB / T3953-2009.

[0060] Conductor structure: 19 strands × 17 strands / single wire diameter 0.20mm.

[0061] The bundle direction of the strands is 12 strands to the left and 7 strands to the right, and the bundle pitch ratio is 16~18.

[0062] The stranding direction of the double-stranded conductor is left-handed on the outer layer and right-handed on the...

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Abstract

The invention relates to a twisting-resistant and stretching-resistant mobile type cable. The twisting-resistant and stretching-resistant mobile type cable comprises a plurality of cable cores containing conductors, wherein inter-core filler is arranged among the cable cores, exo-core filler is arranged outside the cable cores, a cable core isolation belt is arranged outside the exo-core filler, a sheathing layer is arranged outside the cable core isolation belt, the conductors are formed through bunching and stranding strand wires, and when the conductors are subjected to strand wire stranding, the directions of stranded wires of all layers are the same and the directions of the stranded wires of adjacent layers are opposite. A method for preparing the cable comprises the following steps of enabling part of the strand wires to be leftward and enabling part of the strand wires to be rightward during the bunching of the strand wires of the conductors, enabling the stranding direction of the stranded wires in each layer to be the same during the stranding of the conductors, and enabling the stranding direction of the stranded wires in an outer layer to be opposite to that in an inner layer, thereby obtaining the twisting-resistant and stretching-resistant mobile type cable. The cable provided by the invention is applicable to occasions that the cable is subjected to the action of stretching and repeated twisting during the operation of mobile electrical equipment; during the operation, the conductor cores of the cable do not break, the insulation is not damaged, and the cable cores do not deform.

Description

technical field [0001] The invention relates to a power cable, in particular to a torsion-resistant and tensile-resistant mobile cable for a rated voltage of 0.6 / 1kV and below and a preparation method thereof, which is mainly used for electrical connection of mobile electrical equipment. Background technique [0002] 450 / 750V and below mobile rubber insulated and sheathed cables in JB / T 8735 and GB / T 5013 general-purpose rubber-sheathed cables are suitable for various movable electrical equipment, electric tools, instruments and household appliances as power supplies line use. This type of cable is made of thin copper wires bundled together and re-twisted into conductors. Generally, it is the fifth kind of soft copper conductor, which is then extruded with a rubber insulating layer, vulcanized, multi-core twisted into a cable, and then extruded with a sheath and vulcanized. [0003] At present, various types of mobile electrical equipment, such as ground rail lifting equip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B9/00H01B13/02
Inventor 杜敏杰
Owner 宜昌红旗永进电气有限公司
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