CN215988203U

CN215988203U - Safety protection type power cable

Info

Publication number: CN215988203U
Application number: CN202122440612.0U
Authority: CN
Inventors: 刘诺; 张书琴; 李晓琴; 曹华; 谭大兴
Original assignee: Hubei Yisi Chuangju Power Engineering Co ltd
Current assignee: Hubei Yisi Chuangju Power Engineering Co ltd
Priority date: 2021-10-11
Filing date: 2021-10-11
Publication date: 2022-03-08
Anticipated expiration: 2031-10-11

Abstract

The utility model discloses a safety protection type power cable which comprises an inner core mechanism and a protection assembly wrapped outside the inner core mechanism, wherein an air channel and a foaming insulator are sequentially clamped between the protection assembly and the inner core mechanism from outside to inside, the inner core mechanism comprises a main cable core assembly and a plurality of auxiliary cable core assemblies, the plurality of auxiliary cable core assemblies are in an annular structure and surround the periphery of the main cable core assembly at intervals, and the foaming insulator is filled between the plurality of auxiliary cable core assemblies and the main cable core assembly. According to the utility model, the protection measures which are taken into consideration from inside to outside are adopted, so that the good transmission characteristic is shown, the inner and outer layer structures are kept firmer and more stable, the whole structure is more reliable and safer, and meanwhile, the inner core mechanism of the main cable core assembly is wrapped by the auxiliary cable core assembly, so that the power cable is compact in structure, has better compression-resistant, corrosion-resistant and deformation-resistant characteristics, and is beneficial to prolonging the service life.

Description

Safety protection type power cable

Technical Field

The utility model relates to the technical field of power cables, in particular to a safety protection type power cable.

Background

The power cable is a cable product used for transmitting and distributing high-power electric energy in a trunk line of a power system, and is commonly used for urban underground power grids, power station leading-out lines, power supply inside industrial and mining enterprises and power transmission lines under river-crossing seawater. With the continuous enlargement of the scales of industries such as the Chinese power industry, the data communication industry, the urban rail transit industry, the automobile industry, the shipbuilding industry and the like, the demand on the electric wire and the electric cable is rapidly increased, and the electric wire and the electric cable have huge development potential in the future.

The basic structure of the power cable is composed of a core (conductor), an insulating layer, a shielding layer and a protective layer. The core is the conductive part of the power cable, is used for transmitting electric energy, and is the main part of the power cable. The insulating layer electrically isolates the wire cores from the ground and the wire cores of different phases, ensures electric energy transmission and is an indispensable component in a power cable structure. Power cables of 15KV and above generally have a conductor shield and an insulation shield. The protective layer functions to protect the power cable from external impurities and moisture, and to prevent external force from directly damaging the power cable.

The conductor wire cores in most cables are numerous and have different functions, but in the prior art, gaps among the wire cores in many cables are large, so that the wire cores are easy to shift in the extrusion process, the cables are easy to loose and crush in the construction process, and meanwhile, due to the fact that the cables are corroded and damaged by environmental or artificial factors, the cables are easy to scrap and even are damaged by electric accidents.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a reliable and stable safety protection type power cable.

In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a safety protection type power cable, is in including inner core mechanism and parcel the outside protection subassembly of inner core mechanism, the protection subassembly with press from both sides in proper order by outer to interior between the inner core mechanism and be equipped with air passage and foaming insulator, inner core mechanism includes main cable core subassembly and a plurality of vice cable core subassembly, and is a plurality of vice cable core subassembly is the loop configuration interval and centers on main cable core subassembly's periphery, the foaming insulator is filled in a plurality of vice cable core subassembly with between the main cable core subassembly.

Furthermore, the protection assembly comprises an outer sheath, an oxygen-isolating flame-retardant layer, a composite shielding layer and an outer reinforcing band layer, wherein the outer sheath, the oxygen-isolating flame-retardant layer, the composite shielding layer and the outer reinforcing band layer are sequentially wrapped from outside to inside, the outer sheath is made of ceramic silicon rubber and is formed by inward extrusion, the oxygen-isolating flame-retardant layer is made of a low-smoke halogen-free material made by an irradiation crosslinking technology and is formed by inward extrusion, the composite shielding layer is formed by overlapping and longitudinally wrapping copper wires electroplated with two or more different materials, and the outer reinforcing band layer is wrapped on the foamed insulator.

Furthermore, the foamed insulator is in a cross-plum-blossom-shaped structure, each top corner of the foamed insulator is abutted to the inner wall of the outer reinforced belt layer, and the air channel is formed by a gap formed between the outer reinforced belt layer and the foamed insulator.

Further, it is a plurality of even interval distribution of vice cable core subassembly is in the inside edge of foaming insulator, vice cable core subassembly includes first inlayer sheath and a plurality of solid conductor, first inlayer sheath parcel is in a plurality of solid conductor's outside, it is a plurality of solid conductor centers on forming annular structure to inside is equipped with first hollow intermediate layer area, and the inside of first hollow intermediate layer area forms the hollow passageway in aperture, first inlayer sheath adopts ceramic silicon rubber material, just first inlayer sheath with between the first hollow intermediate layer area and be located each solid conductor's outside packing has the inner gap filling layer that blocks water, the inner gap filling layer that blocks water adopts glass fiber strap and polyester fiber non-woven strap to form around the package to at the surface coating has the sealant after the package.

Furthermore, the main cable core assembly is fixed at the center inside the foaming insulator, the main cable core assembly comprises a plurality of twisted conductor rings with different diameters and concentric with the center, the twisted conductor rings are sequentially attached from inside to outside, a second hollow interlayer belt is respectively clamped between every two adjacent twisted conductor rings, a hollow channel with a small aperture is formed inside the second hollow interlayer belt on the innermost layer, an inner reinforcing belt layer is wound outside the outermost twisted conductor ring, and foaming insulating agents are respectively filled between every two twisted conductor rings.

Further, main cable core subassembly still includes outer band filling layer and the second inlayer sheath of blocking water, outer band filling layer that blocks water is the cross plum blossom form, and is a plurality of first inlayer sheath is identical, the second inlayer sheath adopts ceramic silicon rubber material, and presss from both sides and establish outer band filling layer that blocks water with between the interior reinforced strip layer, outer band filling layer that blocks water adopts glass fiber strap and polyester fiber non-woven strap to form around the package to at the surface coating have the sealant after the package.

The utility model has the beneficial effects that:

according to the utility model, the protection measures which are taken into consideration from inside to outside are adopted, so that the good transmission characteristic is shown, the inner and outer layer structures are kept firmer and more stable, the whole structure is more reliable and safer, and meanwhile, the inner core mechanism of the main cable core assembly is wrapped by the auxiliary cable core assembly, so that the power cable is compact in structure, has better compression-resistant, corrosion-resistant and deformation-resistant characteristics, and is beneficial to prolonging the service life.

Drawings

Fig. 1 is an overall cross-sectional view of a power cable according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view of a secondary core assembly according to an embodiment of the present invention.

FIG. 3 is a schematic cross-sectional view of a primary core assembly according to an embodiment of the present invention.

The components in the drawings are labeled as follows: 1. a protection component; 2. an outer sheath; 3. an oxygen barrier flame retardant layer; 4. a composite shielding layer; 5. an outer reinforcement tape layer; 6. an air passage; 7. a foamed insulator; 8. a secondary cable core assembly; 801. a first inner jacket; 802. an inner gap water-blocking filling layer; 803. a solid conductor; 804. a first hollow interlayer tape; 9. a main cable core assembly; 901. externally wrapping a water-blocking filling layer; 902. a second inner jacket; 903. an inner reinforcement tape layer; 904. twisting the conductor ring; 905. a foamed insulating agent; 906. a second hollow interlayer tape.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The embodiments and features of the embodiments in the present application may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, "a plurality" means two or more. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

See fig. 1-3.

The utility model relates to a safety protection type power cable which comprises an inner core mechanism and a protection assembly 1 wrapped outside the inner core mechanism, wherein an air channel 6 and a foaming insulator 7 are sequentially clamped between the protection assembly 1 and the inner core mechanism from outside to inside, the inner core mechanism comprises a main cable core assembly 9 and a plurality of auxiliary cable core assemblies 8, the plurality of auxiliary cable core assemblies 8 are annularly arranged around the periphery of the main cable core assembly 9 at intervals, and the foaming insulator 7 is filled between the plurality of auxiliary cable core assemblies 8 and the main cable core assembly 9.

In one embodiment, the protection component 1 comprises an outer sheath 2, an oxygen-isolating flame-retardant layer 3, a composite shielding layer 4 and an outer reinforcing band layer 5 which are sequentially wrapped from outside to inside, the outer sheath 2 is made of ceramic silicon rubber and is formed by inward extrusion, the oxygen-isolating flame-retardant layer 3 is made of low-smoke halogen-free materials made by irradiation crosslinking technology and is formed by inward extrusion, the composite shielding layer 4 is formed by overlapping and longitudinally wrapping copper wires electroplated with two or more different materials, and the outer reinforcing band layer 5 wraps the foamed insulator 7, so that the protection component 1 enhances the protection of the inner core mechanism, when an open fire suddenly occurs, residues generated after the outer sheath 2 made of ceramic silicon rubber is burnt are in a ceramic hard shell shape, and the hard shell has the characteristics of no melting and no dripping at a high temperature, and can delay the line damage state under the condition of a fire, win the time for personnel's escape or system control, even if when under the condition that outer sheath 2 burns out completely, separate oxygen fire-retardant layer 3 and possess low smoke and zero halogen nontoxic characteristic, visual scope is big under not only the combustion state, and fire resistance and high temperature resistance are strong moreover, ensure the safety of inner core mechanism, compound shielding layer 4 helps reducing the electric energy loss for this power cable demonstrates good transmission characteristics, outer band layer 5 is around the package inner core mechanism for many sinle silks are closely parallel or twist, are difficult for loosely.

In an embodiment, the foamed insulator 7 is in a cross-plum-blossom-shaped structure, each vertex angle is abutted to the inner wall of the outer reinforcing band layer 5, the air channel 6 is formed by a gap formed between the outer reinforcing band layer 5 and the foamed insulator 7, in such a design, the foamed insulator 7 is made by mixing polyethylene polymers, so that the phenomena of outward leakage of foamed gas or combination and coarsening of bubbles and the like are effectively avoided, the air channel 6 provides a space for the foamed insulator 7 to expand under heating, and therefore, not only can the inner core be prevented from being damaged under the heating state, but also the inner core can be expanded from inside to outside, and the structure is round and firm.

In one embodiment, a plurality of secondary cable core assemblies 8 are uniformly distributed at intervals at the edge inside the foamed insulator 7, each secondary cable core assembly 8 comprises a first inner sheath 801 and a plurality of solid conductors 803, the first inner sheath 801 is wrapped outside the plurality of solid conductors 803, the plurality of solid conductors 803 are surrounded to form an annular structure, a first hollow interlayer tape 804 is arranged inside the annular structure, a small-bore hollow channel is formed inside the first hollow interlayer tape 804, the first inner sheath 801 is made of a ceramic silicon rubber material, an inner gap water-blocking filling layer 802 is filled between the first inner sheath 801 and the first hollow interlayer tape 804 and outside each solid conductor 803, the inner gap water-blocking filling layer 802 is formed by wrapping glass fiber cloth tapes and polyester fiber non-woven cloth tapes, and a sealant is coated on the surface after wrapping, design like this, first inlayer sheath 801 with 2 functional effects of outer sheath are the same, protect inside solid conductor 803 adds the protective barrier, the inner gap filling layer 802 that blocks water plays sealed clearance, waterproof effect that blocks water on the one hand, and on the other hand increases the adhesion force at interface, also can keep when drinking water to dash the water 8 inner structure of auxiliary cable core subassembly is stable relatively, the hollow passageway of the inside formation aperture of first hollow intermediate layer area 804 can alleviate power cable's weight, can block water the filling layer 802 again and meet the water inflation headspace for the inner gap.

In one embodiment, the main cable core assembly 9 is fixed at the center inside the foamed insulator 7, the main cable core assembly 9 includes a plurality of concentrically arranged stranded conductor rings 904 with different diameters, the plurality of stranded conductor rings 904 are sequentially attached from inside to outside, a second hollow interlayer tape 906 is respectively sandwiched between two adjacent stranded conductor rings 904, a hollow channel with a small aperture is formed inside the innermost layer of the second hollow interlayer tape 906, an inner reinforcing tape layer 903 is wrapped outside the outermost layer of the stranded conductor rings 904, and a foamed insulating agent 905 is respectively filled between each layer of the stranded conductor rings 904, so that a plurality of layers of the stranded conductor rings 904 are sequentially surrounded from inside to outside inside of the main cable core assembly 9, and the main cable core assembly has high-frequency, high-speed, high-capacity and other high-quality transmission advantages, and the second hollow interlayer tape 906 separates each layer of the stranded conductor rings 904, the weight of the power cable is reduced, a space is reserved for expansion of the foaming insulating agent 905, and the foaming insulating agent 905 is expanded with heat and then extrudes the stranded conductor ring 904 to protect each stranded conductor.

In an embodiment, the main cable core assembly 9 further includes an outer-wrapped water-blocking filling layer 901 and a second inner-layer sheath 902, the outer-wrapped water-blocking filling layer 901 is in a cross-quincunx shape and is matched with the plurality of first inner-layer sheaths 801, the second inner-layer sheath 902 is made of a ceramic silicon rubber material and is clamped between the outer-wrapped water-blocking filling layer 901 and the inner reinforcing tape layer 903, the outer-wrapped water-blocking filling layer 901 is formed by wrapping a glass fiber cloth tape and a polyester fiber non-woven cloth tape, and a sealant is coated on the surface of the wrapped outer-wrapped water-blocking filling layer 901, so that the outer-wrapped water-blocking filling layer 901 has the same function and effect as the inner-gap water-blocking filling layer 802, and the outer-wrapped water-blocking filling layer 901 is located inside the foamed insulator 7 to prevent the foamed insulator 7 from crushing the main cable core assembly 9 after expansion, the second inner sheath 902 has the same action effect as the outer sheath 2, the twisted conductor ring 904 in the second inner sheath is protected, a flame-retardant protective barrier is added, and the inner reinforcing tape 903 wraps the twisted conductor ring 904, so that a plurality of wire cores are closely parallel or twisted, the wire cores are not easy to loosen, and the compactness of the structure is improved.

It should be understood that the examples and embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and that various modifications or changes in light thereof will be suggested to persons skilled in the art and are to be included within the spirit and purview of this disclosure.

Claims

1. The utility model provides a safety protection type power cable which characterized in that: be in including inner core mechanism and parcel inner core outside protection subassembly (1) of mechanism, protection subassembly (1) with from outer to interior clamp gradually between the inner core mechanism and be equipped with air passage (6) and foaming insulator (7), inner core mechanism includes main cable core subassembly (9) and a plurality of vice cable core subassembly (8), and is a plurality of vice cable core subassembly (8) are the loop configuration interval and center on the periphery of main cable core subassembly (9), foaming insulator (7) are filled in a plurality of vice cable core subassembly (8) with between main cable core subassembly (9).

2. The safety guarded power cable of claim 1, wherein: protection component (1) includes outer sheath (2), separates oxygen fire-retardant layer (3), composite shielding layer (4) and outer band reinforcement (5) that wrap up in proper order from outer to interior, outer sheath (2) adopt the ceramic silicon rubber material to inwards crowded package constitutes, separate oxygen fire-retardant layer (3) and adopt low smoke and zero halogen material to inwards crowded package constitutes, composite shielding layer (4) adopt the copper wire that has two kinds and two kinds of different materials of electricity to overlap and indulge the package and constitute, outer band reinforcement (5) are around the package foaming insulator (7).

3. The safety guarded power cable of claim 2, wherein: the foamed insulator (7) is in a cross-plum-blossom-shaped structure, each vertex angle is abutted to the inner wall of the outer reinforced belt layer (5), and the air channel (6) is formed by a gap formed between the outer reinforced belt layer (5) and the foamed insulator (7).

4. The safety guarded power cable of claim 3, wherein: a plurality of even interval distribution of secondary cable core subassembly (8) is in the inside edge of foaming insulator (7), secondary cable core subassembly (8) includes first inlayer sheath (801) and a plurality of solid conductor (803), first inlayer sheath (801) parcel is in a plurality of the outside of solid conductor (803), and is a plurality of solid conductor (803) surround and form annular structure to inside is equipped with first hollow intermediate layer area (804), and the inside of first hollow intermediate layer area (804) forms the hollow passageway of aperture, first inlayer sheath (801) with between first hollow intermediate layer area (804) and be located each the outside packing of solid conductor (803) has interior clearance water blocking filling layer (802).

5. The safety guarded power cable of claim 4, wherein: the main cable core assembly (9) is fixed at the center inside the foaming insulator (7), the main cable core assembly (9) comprises a plurality of twisted conductor rings (904) with different diameters and sizes, the twisted conductor rings (904) are sequentially attached from inside to outside, a second hollow interlayer belt (906) is respectively clamped between every two adjacent twisted conductor rings (904), the second hollow interlayer belt (906) is arranged on the innermost layer, a hollow channel with a small aperture is formed inside the second hollow interlayer belt (906), the outer layer of the twisted conductor rings (904) is wound with an inner reinforcing belt layer (903), and foaming insulating agents (905) are respectively filled between every two twisted conductor rings (904).

6. The safety guarded power cable of claim 5, wherein: the main cable core assembly (9) further comprises an outer tape water-blocking filling layer (901) and a second inner-layer sheath (902), wherein the outer tape water-blocking filling layer (901) is in a cross quincunx shape and is matched with the first inner-layer sheaths (801), and the second inner-layer sheath (902) is clamped between the outer tape water-blocking filling layer (901) and the inner reinforcing tape layer (903).