CN218730066U

CN218730066U - Multi-core power cable with current early warning function

Info

Publication number: CN218730066U
Application number: CN202220292957.8U
Authority: CN
Inventors: 黄建卫; 蔡长威; 刘书鑫; 王礼国; 丁志楠
Original assignee: Zhejiang Yuantong Wire and Cable Manufacturing Co Ltd
Current assignee: Zhejiang Yuantong Wire and Cable Manufacturing Co Ltd
Priority date: 2022-02-14
Filing date: 2022-02-14
Publication date: 2023-03-24
Anticipated expiration: 2032-02-14

Abstract

The utility model discloses a multicore power cable with electric current early warning function, including a plurality of power sinle silks around the common transposition of an overcurrent early warning control sinle silk and form the cable core, the outside cladding in proper order of cable core has the AFRP weaving layer, PET resin area indulges a packet inoxidizing coating, copper foil layer and PVC oversheath, overcurrent early warning control sinle silk includes that two insulation core pair twists and constitutes the line core, the outside cladding of sinle silk has the polyurethane external insulation layer, power sinle silk includes the crowded package insulating layer of inner conductor and fluororesin, the insulation core includes stainless steel monofilament conductor and EVA inner insulating layer, the PET resin area is indulged and is wrapped the electroplating formation copper foil layer on the inoxidizing coating surface, the cable core external diameter is 11mm to 13mm, PVC oversheath external diameter is 13mm to 14mm. This cable is through configuration overcurrent early warning control sinle silk, when taking place the overcurrent, can in time provide the early warning, effectively prevents that the cable from catching fire the occurence of failure.

Description

Multi-core power cable with current early warning function

Technical Field

The utility model relates to the technical field of cables, especially, relate to a multicore power cable with electric current early warning function.

Background

Along with the continuous improvement of the related technology of the conventional cable and the continuous acceleration of the global urbanization process, more attention is paid to the exertion of the excellent characteristics of simple and easy manufacturing safety process and the like, the high polymer materials for the cable, except polyvinyl chloride, have the largest using amount of polyolefin, wherein polyethylene and polypropylene are most commonly used, and the high polymer materials are mostly used for manufacturing the conventional cable due to good physical and mechanical properties, higher heat resistance, excellent electrical insulation and chemical stability. On the basis of keeping excellent electrical characteristics, the cable gradually trends to the development trend of diameter reduction and weight reduction, and the cable brings a plurality of benefits such as convenient transportation, low manufacturing cost, economy, practicality, low efficiency and the like for industrial technology. However, the ordinary cable does not have the over-current warning function, when the current is too large to cause fire, the flammable insulating material and the sheath material in the cable can be ignited, so that the fire accident is expanded, the fire fighters are prevented from taking the measures of fire extinguishing and rescue in time, and not only property loss can be caused, but also casualty accidents can be caused.

Disclosure of Invention

The utility model discloses to prior art not enough, the technical problem that solve provides a multicore power cable with electric current early warning function, optimizes structural design, through configuration overcurrent early warning control sinle silk, when taking place the overcurrent, can in time provide the early warning, effectively prevents that the cable from catching fire the occurence of failure.

The utility model discloses a make above-mentioned technical problem solve through following technical scheme.

Multicore power cable with electric current early warning function, including a plurality of power sinle silks around the common transposition of an overcurrent early warning control sinle silk and form the cable core, the outside cladding in proper order of cable core has AFRP weaving layer, PET resin area to indulge a packet inoxidizing coating, copper foil layer and PVC oversheath, overcurrent early warning control sinle silk includes two insulation core pair twists and constitutes the line core, the outside cladding of sinle silk has the polyurethane external insulation layer, the power sinle silk includes the crowded package insulating layer of inner conductor and fluororesin, insulation sinle silk includes stainless steel monofilament conductor and EVA internal insulation layer, the PET resin area is indulged and is wrapped the electroplating formation on the inoxidizing coating surface copper foil layer, the cable core external diameter is 11mm to 13mm, PVC oversheath external diameter is 13mm to 14mm, PVC oversheath thickness is 0.5mm to 1.2mm.

Preferably, the diameter of the stainless steel monofilament conductor wire is 0.8mm to 1.2mm.

Preferably, the inner conductor wire diameter is not less than 75% of the outer diameter of the power supply wire core.

Preferably, the inner conductor has a diameter of 2.8mm to 4.2mm.

Preferably, the fluororesin extrusion insulating layer is an ETFE, FEP or PTFE insulating layer.

Preferably, the copper foil layer has a thickness of 5 μm to 10 μm.

Preferably, the AFRP woven layer is formed by weaving an inner aramid twisted yarn and an outer aramid twisted yarn which are spirally wound in opposite directions.

Preferably, the thickness of the AFRP woven layer is not less than 0.2mm.

Preferably, the inner conductor is formed by twisting and pressing a plurality of soft copper wires with the wire diameter of 0.12mm to 0.25mm to form a circular conductor structure.

Preferably, the lay length of the cable core is 10 to 20 times of the outer diameter of the power supply wire core.

The utility model has the advantages as follows:

1. through adding overcurrent early warning control sinle silk in the cable core, because the melting point of the EVA inner insulating layer of overcurrent early warning control sinle silk and polyurethane outer insulating layer is less than the melting point of the crowded package insulating layer of fluororesin of power sinle silk, when overcurrent emergence, the insulating layer of overcurrent early warning control sinle silk melts earlier for two stainless steel monofilament conductor direct contact take place the short circuit, thereby play timely early warning function, before power sinle silk melts to catch fire, the operation personnel can in time take the measure of putting out a fire, the effectual accident that prevents catching fire takes place.

2. Set up PET resin area and indulge a packet of inoxidizing coating between AFRP weaving layer and copper foil layer, copper foil layer and inoxidizing coating form a body structure, in laying the installation, when the cable suffered the bending, produced corresponding friction of sliding between inoxidizing coating and the AFRP weaving layer to the effectual copper foil layer that prevents produces is chapped, guarantees the electrical property of cable, and durable use is better.

3. Through increasing AFRP weaving layer in the cable core outside, have high strength, high modulus, ageing resistance is excellent, makes the pliability of cable better, reduces copper foil layer stress concentration, reduces the moment of torsion power when crooked, is difficult for taking place copper foil layer phenomenon of cracking, improves the holistic tensile strength of cable, has strengthened the adaptability under the different environment of laying, and the effectual reduction lays the degree of difficulty.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic sectional structure diagram of an embodiment of the present invention.

In the figure: the cable comprises a power wire core, a 2-overcurrent early warning control wire core, a 3-AFRP woven layer, a 4-PET resin tape longitudinal wrapping protective layer, a 5-copper foil layer, a 6-PVC outer sheath, a 7-insulation wire core, an 8-polyurethane outer insulation layer, a 9-inner conductor, a 10-fluororesin extruded insulation layer, a 11-stainless steel monofilament conductor and a 12-EVA inner insulation layer.

Detailed Description

In order to explain the present invention more clearly, the present invention will be further described with reference to the preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.

Referring to fig. 1, the multi-core power cable with current warning function according to the embodiment of the present invention includes a plurality of power cores 1 twisted together around an overcurrent warning control core 2 to form a cable core. Preferably, the lay length of the cable core is 10 to 20 times of the outer diameter of the power supply wire core 1. In this embodiment 6 power cores 1 are used. The power supply wire core 1 comprises an inner conductor 9 and a fluororesin extrusion insulating layer 10, and specifically, the inner conductor 9 is a round conductor structure formed by twisting and pressing a plurality of soft copper wires with the wire diameter of 0.12mm to 0.25 mm. The diameter of the inner conductor 9 is 2.8mm to 4.2mm, and further, the wire diameter of the inner conductor 9 is not less than 75% of the outer diameter of the power wire core 1. The fluororesin extrusion insulating layer 10 is, for example, an ETFE, FEP or PTFE insulating layer. Overcurrent early warning control sinle silk 2 includes that two insulation core 7 pair twists constitution line core, the outer cladding of sinle silk has polyurethane external insulation layer 8, insulation core 7 includes stainless steel monofilament conductor 11 and EVA internal insulation 12, and specific saying so, 11 line footpaths of stainless steel monofilament conductor are 0.8mm to 1.2mm.

The cable core outside cladding has AFRP weaving layer 3, PET resin area in proper order to indulge a packet inoxidizing coating 4, copper foil layer 5 and PVC oversheath 6, the PET resin area is indulged and is wrapped the electroplating formation on the inoxidizing coating 4 surface copper foil layer 5. In one embodiment, the AFRP woven layer 3 is formed by weaving an inner aramid fiber twisted yarn and an outer aramid fiber twisted yarn in a mutually reverse spiral winding manner, and further, the thickness of the AFRP woven layer 3 is not less than 0.2mm. Preferably, the copper foil layer 5 has a thickness of 5 to 10 μm. Preferably, the PVC outer sheath 6 has a thickness of 0.5mm to 1.2mm. The outer diameter of the cable core is 11mm to 13mm, and the outer diameter of the PVC outer sheath 6 is 13mm to 14mm.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and that other variations or modifications of different forms can be made on the basis of the above description for those skilled in the art, and all the embodiments cannot be exhausted here, and all the obvious variations or modifications led out by the technical solutions of the present invention are still in the scope of the present invention.

Claims

1. Multicore power cable with electric current early warning function, characterized by: including a plurality of power sinle silk (1) around overcurrent early warning control sinle silk (2) transposition formation cable core jointly, the cable core outside in proper order the cladding have AFRP weaving layer (3), PET resin area indulge and wrap inoxidizing coating (4), copper foil layer (5) and PVC oversheath (6), overcurrent early warning control sinle silk (2) include two insulation sinle silk (7) to the transposition constitution line core that becomes, the sinle silk outside cladding has polyurethane external insulation layer (8), power sinle silk (1) includes inner conductor (9) and crowded package insulating layer of fluororesin (10), insulation sinle silk (7) include stainless steel monofilament conductor (11) and EVA internal insulation layer (12), the PET resin area indulges and wraps the formation of electroplating on inoxidizing coating (4) surface copper foil layer (5), the cable core external diameter is 11mm to 13mm, PVC oversheath (6) external diameter is 13mm to 14mm, PVC oversheath (6) thickness is 0.5mm to 1.2mm.

2. The multi-core power cable with the current pre-warning function as claimed in claim 1, wherein: the wire diameter of the stainless steel monofilament conductor (11) is 0.8mm to 1.2mm.

3. The multi-core power cable with the current pre-warning function as claimed in claim 1, wherein: the wire diameter of the inner conductor (9) is not less than 75% of the outer diameter of the power wire core (1).

4. The multi-core power cable with the current pre-warning function as claimed in claim 1, wherein: the diameter of the inner conductor (9) is 2.8mm to 4.2mm.

5. The multi-core power cable with the current pre-warning function as claimed in claim 1, wherein: the fluorine resin extrusion coating insulating layer (10) is an ETFE, FEP or PTFE insulating layer.

6. The multi-core power cable with the current pre-warning function as claimed in claim 1, wherein: the thickness of the copper foil layer (5) is 5-10 mu m.

7. The multi-core power cable with the current pre-warning function as claimed in claim 1, wherein: the AFRP weaving layer (3) is formed by weaving an inner aramid fiber twisted wire and an outer aramid fiber twisted wire which are mutually reverse spirally wound.

8. The multi-core power cable with the current pre-warning function as claimed in claim 1, wherein: the thickness of the AFRP woven layer (3) is not less than 0.2mm.

9. The multi-core power cable with the current pre-warning function as claimed in claim 1, wherein: the inner conductor (9) is formed by twisting and pressing a plurality of soft copper wires with the wire diameter of 0.12mm to 0.25mm to form a circular conductor structure.

10. The multi-core power cable with the current pre-warning function as claimed in claim 1, wherein: the cable core lay length is 10 to 20 times of the outer diameter of the power supply wire core (1).