CN221632276U - Highly efficient shielded cable - Google Patents

Abstract

The utility model belongs to the field of cables, and provides a high-efficiency shielding cable, which comprises a plurality of conductive cable cores, wherein an inorganic mineral mica tape insulating layer is arranged outside the conductive cable cores, a semiconductive shielding layer, a crosslinked polyolefin insulating layer and an outer sheath are sleeved outside the conductive cable cores, the conductive cable cores are divided into three groups, high-temperature resistant aluminum-plastic composite belts are arranged outside the conductive cable cores of each group, a solid filling anti-pulling rope is arranged in the center of each conductive cable core of each group, a polypropylene pressure-resistant layer is arranged between the crosslinked polyolefin insulating layer and the outer sheath, a plurality of curved surface pressure-resistant grooves consistent with the length direction of the polypropylene pressure-resistant layers are arranged on the inner surface and the outer surface of the polypropylene pressure-resistant layers, an armor layer is arranged between the polypropylene pressure-resistant layers and the outer sheath, and a plurality of circumferentially staggered strip-shaped grooves are arranged on the outer surface of the armor layer. The cable has reasonable design, simple structure, good toughness and pressure resistance and long service life, and is suitable for large-scale popularization.

Description

Highly efficient shielded cable

Technical Field

The utility model belongs to the field of cables, and in particular relates to a high-efficiency shielded cable.

Background Art

Cables are usually rope-like cables made of several or several groups of wires twisted together. Each group of wires is insulated from each other and often twisted around a center, with a highly insulating covering layer on the entire outside. Cables have the characteristics of being powered inside and insulated outside. Cables include power cables, control cables, compensating cables, shielded cables, high-temperature cables, computer cables, signal cables, coaxial cables, fire-resistant cables, marine cables, mining cables, aluminum alloy cables, etc. They are all composed of single or multiple strands of wire and an insulating layer, used to connect circuits, electrical appliances, etc. Cables generally include multiple cable cores and an outer sheath structure. The outer sheath structure varies according to the production capacity of different factories and the environment in which the cables are used, but they all need to meet the corresponding factory standards.

The existing patent CN201610561833.4 discloses a special material for ultra-smooth semi-conductive shielded cables and its shielded cable, including a conductive core wire and an inorganic mineral mica tape insulation layer, a semi-conductive inner shielding layer, a cross-linked polyolefin insulation layer, a semi-conductive outer shielding layer, a water-blocking layer, a water-swelling tape and an insulating sheath, which are sequentially wrapped around the outside of the conductive core wire. The conductive core wire is a highly conductive rare earth aluminum alloy conductor, and a metal wire braided wave-proof sleeve is also provided between the water-swelling tape and the insulating sheath. However, since the cable contains a water-swelling tape, this structure easily causes the cable to bulge, affecting the appearance of the cable and its actual service life. In addition, the toughness of the cable in the installation scene is insufficient, affecting the connection reliability of the cable.

Utility Model Content

In view of the technical problems existing in the above-mentioned cables, the utility model provides a high-efficiency shielded cable with reasonable design, simple structure, good toughness and pressure resistance and long service life.

In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is that the high-efficiency shielded cable provided by the utility model comprises a plurality of conductive cable cores, the conductive cable cores are highly conductive rare earth aluminum alloy conductors, the outside of the conductive cable cores is provided with an inorganic mineral mica tape insulation layer, the outer sheaths of the plurality of conductive cable cores are provided with a semi-conductive shielding layer, a cross-linked polyolefin insulation layer and an outer sheath, the plurality of conductive cable cores are divided into three groups and the outside of each group of conductive cable cores is provided with a high-temperature resistant aluminum-plastic composite tape, the centers of the three groups of conductive cable cores are provided with solid filled tensile ropes, a polypropylene pressure-resistant layer is provided between the cross-linked polyolefin insulation layer and the outer sheath, the inner and outer surfaces of the polypropylene pressure-resistant layer are provided with a plurality of curved pressure-resistant grooves consistent with the length direction thereof, an armor layer is provided between the polypropylene pressure-resistant layer and the outer sheath, and the outer surface of the armor layer is provided with a plurality of circumferentially staggered strip grooves.

Preferably, the thickness of the armor layer is less than 2 mm.

Preferably, a drying pad is provided between the armor layer and the outer sheath, and the drying pad is filled with drying powder.

Preferably, a filling rope is provided between the conductive cable core and the high temperature resistant aluminum-plastic composite tape.

Preferably, the polypropylene pressure-resistant layer is provided with tensile metal wires spirally extending along its length direction, and the tensile metal wires are double-strand steel wires.

Compared with the prior art, the advantages and positive effects of the utility model are:

1. The high-efficiency shielded cable provided by the utility model can not only appropriately limit the conductive cable core by adopting the high-temperature resistant aluminum-plastic composite tape, but also play a good shielding role in cooperation with the semi-conductive shielding layer; the solid filling tensile rope and polypropylene pressure-resistant layer can improve the tensile resistance, pressure resistance and toughness of the cable, which is conducive to improving the electrical connection performance of the cable; the armor layer can improve the corrosion resistance of the cable, and the toughness can be appropriately improved after grooving. The cable has a reasonable design, simple structure, good toughness and pressure resistance, and a long service life, and is suitable for large-scale promotion.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

FIG1 is a schematic diagram of the structure of a high-efficiency shielded cable provided in an embodiment;

FIG2 is an expanded view of an armor layer provided in an embodiment;

In the above figures, 1. Conductive cable core; 2. Inorganic mineral mica tape insulation layer; 3. Semi-conductive shielding layer; 4. Cross-linked polyolefin insulation layer; 5. Outer sheath; 6. High temperature resistant aluminum-plastic composite tape; 7. Solid filled tensile rope; 8. Polypropylene pressure-resistant layer; 81. Curved pressure-resistant groove; 9. Armor layer; 91. Strip groove; 10. Filling rope.

DETAILED DESCRIPTION

In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear below, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

Embodiment, as shown in Figures 1 and 2, the high-efficiency shielded cable provided by the utility model comprises a plurality of conductive cable cores 1, wherein the conductive cable cores 1 are highly conductive rare earth aluminum alloy conductors, an inorganic mineral mica tape insulation layer 2 is arranged on the outside of the conductive cable cores 1, and a semi-conductive shielding layer 3, a cross-linked polyolefin insulation layer 4 and an outer sheath 5 are arranged on the outside of the plurality of conductive cable cores 1, wherein the semi-conductive shielding layer 3 is made of a special material for ultra-smooth semi-conductive shielded cables. On this basis, the several conductive cable cores 1 provided by the utility model are divided into three groups and the outside of each group of conductive cable cores 1 is provided with a high temperature resistant aluminum-plastic composite tape 6, the center of the three groups of conductive cable cores 1 is provided with a solid filling tensile rope 7, a polypropylene pressure-resistant layer 8 is provided between the cross-linked polyolefin insulation layer 4 and the outer sheath 5, and the inner and outer surfaces of the polypropylene pressure-resistant layer 8 are provided with a plurality of curved pressure-resistant grooves 81 consistent with the length direction thereof, and the curved surface of the curved pressure-resistant groove 81 has more reaction force surfaces and can bear pressure, and an armor layer 9 is provided between the polypropylene pressure-resistant layer 8 and the outer sheath 5, and a plurality of circumferentially staggered strip grooves 91 are provided on the outer surface of the armor layer 9. In this way, by adopting the high temperature resistant aluminum-plastic composite tape 6, not only can the conductive cable core 1 be appropriately restricted, but also a good shielding effect can be exerted in coordination with the semi-conductive shielding layer 3, and the working performance of the high temperature resistant aluminum-plastic composite tape 6 and the semi-conductive shielding layer 3 is less affected by the outdoor ambient temperature. The solid filled tensile rope 7 can serve as the central positioning structure of the three groups of conductive cable cores 1 on the one hand, and can improve the tensile performance of the cable on the other hand, while the polypropylene pressure-resistant layer 8 can improve the pressure resistance and toughness of the cable, which is beneficial to improving the electrical connection performance of the cable.

Regarding the armor layer 9, its designed thickness is less than 2 mm, which can improve the corrosion resistance of the cable on the one hand, and on the other hand does not affect the integrity of its protection range after grooving, and can appropriately improve its toughness and further improve its electrical connection performance.

In order to improve the waterproof performance of the cable, a drying pad is arranged between the armor layer 9 and the outer sheath 5. The drying pad is filled with drying powder. The drying powder is used to absorb the moisture generated by the electrical working environment and the tiny moisture penetrating from the external environment. However, unlike the water-absorbing and expanding belt in the cable in the prior art, the drying pad will not cause large-area obvious bulging of the cable while performing the drying function.

In order to improve the electrical working performance of the cable, the utility model provides a filling rope 10 between the conductive cable core 1 and the high temperature resistant aluminum-plastic composite tape 6. After the gap between the conductive cable core 1 and the high temperature resistant aluminum-plastic composite tape 6 is filled with the filling rope 10, the circular shape of the outer packaging structure is complete, thereby achieving the purpose of stabilizing the structure.

In order to improve the tensile resistance of the polypropylene pressure-resistant layer 8, the utility model arranges a tensile metal wire spirally extending along the length direction inside the polypropylene pressure-resistant layer 8. The tensile metal wire is a double-strand steel wire. The tensile metal wire can bear certain internal stress when subjected to strong pulling force, and there are small unit tensile changes, while the structure of the entire polypropylene pressure-resistant layer 8 will not have very obvious stretching, thereby making the polypropylene pressure-resistant layer 8 have a longer service life.

The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims (5)

1. The utility model provides a high-efficient shielded cable, includes a plurality of conductive cable core, the conductive cable core is high conductive rare earth aluminum alloy wire, the outside of conductive cable core is provided with inorganic mineral mica tape insulating layer, a plurality of the outside cover of conductive cable core is equipped with semiconductive shield, crosslinked polyolefin insulating layer and oversheath, its characterized in that, a plurality of the conductive cable core divide into three and the outside of every group conductive cable core all is provided with high temperature resistant plastic-aluminum composite tape, the center of three groups conductive cable core is provided with solid packing resistance cable, be provided with polypropylene withstand voltage layer between crosslinked polyolefin insulating layer and the oversheath, polypropylene withstand voltage layer's internal surface and surface all are provided with a plurality of curved surface withstand voltage groove unanimous rather than length direction, be provided with the armor between polypropylene withstand voltage layer and the oversheath, be provided with the strip groove of a plurality of circumference staggered distribution on the surface of armor.

2. The high efficiency shielded electrical cable of claim 1, wherein the thickness of the armor layer is less than 2mm.

3. The high efficiency shielded electrical cable of claim 2, wherein a dry mat is disposed between the armor and the outer jacket, the dry mat being filled with dry powder.

4. A high efficiency shielded electrical cable according to claim 3, wherein a filler rope is provided between the conductive cable core and the high temperature resistant aluminum plastic composite strip.

5. The high-efficiency shielded cable according to claim 4, wherein the polypropylene pressure-resistant layer is internally provided with a tensile wire spirally extending along a length direction thereof, the tensile wire being a double-stranded steel wire.