CN217386755U

CN217386755U - Novel package metal shielding's middling pressure cable

Info

Publication number: CN217386755U
Application number: CN202221092625.1U
Authority: CN
Inventors: 唐俊; 刘伟; 曾宇豪
Original assignee: Hunan Valin Wire and Cable Co Ltd
Current assignee: Hunan Valin Wire and Cable Co Ltd
Priority date: 2022-05-09
Filing date: 2022-05-09
Publication date: 2022-09-06
Anticipated expiration: 2032-05-09

Abstract

The utility model discloses a novel package metallic shield's medium voltage cable, including insulation core, around package shielding layer and restrictive coating, insulation core includes the conductor and uses three-layer crowded mode crowded package in proper order outside the conductor shielding layer, insulating layer and insulation shielding layer altogether, three insulation core and filling layer transposition stranding, wind the package shielding layer around the package in the stranding outside, for single soft copper strips around the package, be provided with the band layer around the package shielding layer outside, the band layer is around the package in the package shielding layer outside, the crowded package of restrictive coating in the band layer outside. The metal shielding layer of the three-core medium-voltage cable is changed into a wrapped metal shielding structure, the insulated wire cores are firstly cabled, and then the wrapped copper strip is wrapped in a wrapping mode. The amount of the partially wrapped metal shielding structure is less than that of the three split-phase shielding copper belts, the cost is saved, the wrapped copper belts can be partially wrapped after the cabling process, the split-phase copper belt shielding process is eliminated, the process is reduced, and the production efficiency is improved. Because the copper strip is wrapped, the three insulation wire cores are wrapped in the copper strip, and the electromagnetic influence can be avoided.

Description

Novel package metal shielding's middling pressure cable

Technical Field

The utility model relates to a cable structure field especially relates to a novel package metal shielding's middling pressure cable.

Background

The rated voltage of the medium-voltage cable is high (6kV-35kV), when the single-core cable is laid, three-phase single-core cables must be laid in a shape like a Chinese character 'pin', and then the electromagnetic interference between every two phases can be eliminated. Electromagnetic interference can lead to transmission current imbalance, easily generate heat, influence life. When one three-core cable is laid, the electromagnetic interference between each phase does not need to be considered, but the three-core cable and another three-core cable laid beside the three-core cable are usually separated by a certain distance to prevent the mutual electromagnetic interference, so the three-core cable is generally laid separately, occupies a certain space and cannot be laid densely. The single-phase metal shielding is adopted, namely, each phase of the insulated wire core (comprising a conductor, a conductor shield, an insulator and an insulation shield) is respectively wrapped with a copper strip and then stranded into a cable core structure. The phase-splitting shielding structure has some defects, such as more copper strip raw materials are used, and the cost is high; the structure is relatively complex; it fails to completely shield the electric and magnetic fields of other surrounding cables to this cable.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel package metal shielding's middling pressure cable to solve the problem that current middling pressure cable structure is complicated, shielding material materials are many, shielding effect is not good.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a novel package metallic shield's medium voltage cable, includes insulating core, winds package shielding layer and restrictive coating, insulating core includes the conductor and uses three-layer crowded package in proper order outside the conductor shielding layer, insulating layer and insulating shielding layer altogether, three insulating core and filling layer transposition stranding, wind the package shielding layer around the package in the stranding outside, for single soft copper strips around the package, be provided with the band layer around the package shielding layer outside, the band layer winds the package in the package shielding layer outside, the crowded package in the band layer outside of restrictive coating.

As a further improvement of the technical scheme:

the wrapping band layer is one or the combination of a polypropylene band and a non-woven band.

The sheath layer is one or combination of a polyvinyl chloride sheath, a polyethylene sheath or a low-smoke halogen-free polyolefin sheath.

The filling layer is one or combination of a plurality of polypropylene ropes, flame-retardant polypropylene ropes or rock wool ropes.

The thickness of the copper strip wrapping the shielding layer is 0.1-0.15 mm.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a novel package metal shield's middling pressure cable changes three-core middling pressure cable metal shield layers into and wraps the metal shield structure in a package, earlier becomes the insulated core stranding promptly, wraps the package copper strips in a package again. The shielding structure has the following advantages: the amount of the partially wrapped metal shielding structure is less than that of the three split-phase shielding copper belts, and the cost is advantageous. In the production process, the copper strip can be wrapped around after the cabling process, the process of split-phase copper strip shielding is eliminated, the processes can be one less, and the production efficiency is improved. Because wrap the copper strips entirely, all wrap the copper strips with three insulation core, the cable avoids the electromagnetic influence of other cables.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Reference numerals: 1. a conductor; 2. a conductor shield layer; 3. an insulating layer; 4. an insulating shield layer; 5. a filling layer; 6. wrapping a shielding layer; 7. a belting layer; 8. a sheath layer.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, the novel package metallic shield's of this embodiment middling pressure cable, including insulating core, wrap shielding layer 6 and restrictive coating 8 around, insulating core includes conductor 1 and uses the three-layer crowded package in proper order outside conductor 1 conductor shielding layer 2 altogether, insulating layer 3 and insulating shielding layer 4, three insulating core and 5 transposition stranding of filling layer, wrap shielding layer 6 around the package in the stranding outside, for single soft copper strips are wrapped around the package, be provided with band layer 7 outside wrapping shielding layer 6, band layer 7 is wrapped around the package in the 6 outsides of wrapping shielding layer, 8 crowded packages in the band layer 7 outsides of restrictive coating. The conductor 1 is a copper, aluminum or aluminum alloy conductor, a three-layer co-extrusion structure outside the conductor is a common structure in the field, and the conductor shielding layer 2 is a cross-linkable inner shielding material; the insulating layer 3 is a crosslinkable polyethylene insulating material; the insulation shielding layer 4 is a cross-linkable outer shielding material; when the cable is twisted, the cable is mixed with the filling rope, so that the tensile property of the cable is improved.

The wrapping band layer 7 is one or the combination of a polypropylene band and a non-woven band.

The sheath layer 8 is one or combination of polyvinyl chloride sheath, polyethylene sheath or low smoke zero halogen polyolefin sheath.

The filling layer 5 is one or combination of polypropylene rope, flame-retardant polypropylene rope or rock wool rope.

The thickness of the copper strip wrapping the shielding layer 6 is 0.1-0.15 mm.

The utility model discloses change three-core medium voltage cable metallic shield layer into and to include the metallic shield structure entirely, earlier become the cable with insulating core promptly, include again entirely around the package copper strips. The shielding structure has the following advantages: the amount of the partially wrapped metal shielding structure is less than that of the three split-phase shielding copper belts, and the cost is advantageous. In the production process, the copper strip can be wrapped around after the cabling process, the process of split-phase copper strip shielding is eliminated, the processes can be one less, and the production efficiency is improved. Because wrap the copper strips entirely, all wrap the copper strips with three insulation core, the cable avoids the electromagnetic influence of other cables.

The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the schemes is not described herein. It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a novel package metallic shield's medium voltage cable, includes insulating core, wraps shielding layer (6) and restrictive coating (8), insulating core includes conductor (1) and crowds in proper order with the three-layer mode of crowded package in conductor (1) outer conductor shielding layer (2), insulating layer (3) and insulating shielding layer (4) altogether, its characterized in that: three insulation core and filling layer (5) transposition stranding, wind package shielding layer (6) around the package in the stranding outside, for single soft copper strips around the package, be provided with band layer (7) outside winding package shielding layer (6), band layer (7) are around the package in the package shielding layer (6) outside, restrictive coating (8) crowded package in band layer (7) outside.

2. The novel medium voltage cable with partial metallic shielding of claim 1, wherein: the wrapping band layer (7) is one or the combination of a polypropylene band and a non-woven band.

3. The novel medium voltage cable with partial metallic shielding of claim 1, wherein: the sheath layer (8) is one or combination of a polyvinyl chloride sheath, a polyethylene sheath or a low-smoke halogen-free polyolefin sheath.

4. The novel medium voltage cable with partial metallic shielding of claim 1, wherein: the filling layer (5) is one or combination of polypropylene rope, flame-retardant polypropylene rope or rock wool rope.

5. The novel medium voltage cable with partial metallic shielding of claim 1, wherein: the thickness of the copper strip wrapping the shielding layer (6) is 0.1-0.15 mm.