CN216597007U

CN216597007U - Metal shielded cable

Info

Publication number: CN216597007U
Application number: CN202123155081.7U
Authority: CN
Inventors: 胡磊磊; 高承华; 康树峰; 李艳辉
Original assignee: Shenzhen Woer Heat Shrinkable Material Co Ltd
Current assignee: Shenzhen Woer Heat Shrinkable Material Co Ltd
Priority date: 2021-12-14
Filing date: 2021-12-14
Publication date: 2022-05-24
Anticipated expiration: 2031-12-14

Abstract

The utility model discloses a metal shielded cable which comprises a conductor, a conductive buffer layer, a grounding wire, an insulating inner sheath and an outer sheath, wherein the conductor is arranged on the inner sheath; the conductive buffer layer surrounds the conductor, the insulating inner sheath is sleeved outside the conductive buffer layer, the outer sheath is sleeved outside the insulating inner sheath, one end of the grounding wire is electrically connected to the conductive buffer layer and is wrapped by the insulating inner sheath, and the other end of the grounding wire is connected with a grounding terminal. The technical scheme of the utility model provides safer guarantee for the operation and use of the cable.

Description

Metal shielded cable

Technical Field

The utility model relates to the technical field of cables, in particular to a metal shielding cable.

Background

In the current social life, a direct current cable is often needed to be matched with a power device. The direct current cable is required to have high voltage (more than 10 kV), is resistant to surrounding electric field interference, has good safety performance, and can adapt to different use occasions. When the cable is in the operation of loading, can form induced voltage at the shielding layer, if the shielding at both ends ground simultaneously, form the return circuit between shielding layer and ground, can produce induced-current, the cable shielding layer can generate heat like this, and the normal operating of circuit is influenced to a large amount of electric energy of loss, when cable circuit takes place short circuit fault, suffers thunder and lightning impulse or operation overvoltage, can form very high induced voltage on the shielding. Personal safety will be compromised and even the cable outer sheath may be punctured. In order to avoid this phenomenon, it is necessary to use a mode of grounding one end.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a metal shielding cable, which provides safer guarantee for the operation and use of the cable.

In order to achieve the above object, the present invention provides a metal shielded cable, including: the cable comprises a conductor, a conductive buffer layer, a grounding wire, an insulating inner sheath and an outer sheath;

the conductive buffer layer surrounds the conductor, the insulating inner sheath is sleeved outside the conductive buffer layer, the outer sheath is sleeved outside the insulating inner sheath, one end of the grounding wire is electrically connected to the conductive buffer layer and is wrapped by the insulating inner sheath, and the other end of the grounding wire is connected with a grounding terminal.

Optionally, the ground wire is formed by twisting a plurality of copper wires.

Optionally, the ground lead and the ground terminal are fixed by crimping.

Optionally, a metal armor layer is disposed between the inner insulating sheath and the outer sheath.

Optionally, the cable further comprises an insulating tape layer, and the insulating tape layer wraps a part of the insulating inner sheath and the grounding wire.

Optionally, the distance between the insulating tape layer and the inner insulating sheath is 80mm to 150 mm.

Optionally, the conductive buffer layer is wrapped by the tightened copper tape layer close to the insulating tape layer in the direction away from the insulating inner sheath.

Optionally, the self-width lapping winding of the fastening copper strip with the fastening copper strip layer of 1/3-1/2 is formed.

Optionally, a semi-conductive self-adhesive tape layer is arranged outside the tightening copper strip layer.

The metal shielding cable comprises a conductor, a conductive buffer layer, a grounding wire, an insulating inner sheath and an outer sheath; the conductive buffer layer surrounds the conductor, the insulating inner sheath is sleeved outside the conductive buffer layer, the outer sheath is sleeved outside the insulating inner sheath, one end of the grounding wire is electrically connected to the conductive buffer layer and is wrapped by the insulating inner sheath, and the other end of the grounding wire is connected with the grounding terminal. Therefore, the running use of the cable is ensured to be safer.

Drawings

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

FIG. 1 is a schematic structural diagram of an embodiment of a metal shielded cable according to the present invention when power connection wires are not twisted;

FIG. 2 is a schematic structural view of the metal shielded cable of FIG. 1 with the copper ribbon fastened and the power connection lead unfolded;

FIG. 3 is a schematic structural view of a metal shielded cable after a tightening copper tape and an electric connecting lead are wound;

fig. 4 is a schematic structural diagram of an embodiment of a metal shielded cable.

The reference numbers illustrate:

reference numerals	Name(s)	Reference numerals	Name (R)
				10	Metal shielded cable	4	Insulating inner sheath
1	Conductor	5	Outer sheath
				2	Conductive buffer layer	6	Fastening copper strip
3	Grounding conductor	7	Insulating tape layer

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely 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. 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.

In the present invention, unless otherwise explicitly stated or limited, the terms "connected", "fixed", and the like are to be understood broadly, for example, "fixed" may be fixedly connected, may be detachably connected, or may be integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are 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, 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.

The utility model provides a metal shielding cable.

Referring to fig. 1 to 4, in an embodiment of the present invention, the metal shielded cable 10 includes a conductor 1, a conductive buffer layer 2, a ground wire 3, an insulating inner sheath 4, and an outer sheath 5;

the conductive buffer layer 2 surrounds the conductor 1, the insulating inner sheath 4 is sleeved outside the conductive buffer layer 2, the outer sheath 5 is sleeved outside the insulating inner sheath 4, one end of the grounding wire 3 is electrically connected to the conductive buffer layer 2 and is coated by the insulating inner sheath 4, and the other end of the grounding wire 3 is connected with a grounding terminal.

In this embodiment, the ground lead 3 is formed by twisting a plurality of copper wires, and a ground terminal is crimped to the end of the gathered copper wires.

Next, a method for manufacturing the metal-shielded cable 10 according to the present embodiment will be described with reference to fig. 1 to 4.

Specifically, referring to fig. 1, during manufacturing, a portion of the exposed conductor 1 is reserved in advance, or the fracture position of the insulating inner sheath 4 is measured according to the actual required size, and the excess inner sheath portion is removed, so that the metal wire-shaped shield and the metal band (for example, copper band) for fastening the metal wire-shaped shield are exposed.

Then, referring to fig. 2, all the tightened copper strips 6 are retained, and then the shielding copper wires are folded back with the insulation inner sheath 4 break as a folding point. The copper wire is divided into three strands to be woven into a copper braid (the copper braid and the armored ground wire are respectively arranged on two sides of the cable), the tail end of the shielding copper ground wire is trimmed and is pressed with a wire lug, and then a black insulating tube (shown in figure 4) with the length of 120mm is sleeved on the copper braid, so that the copper braid and the armor are insulated (the tail end of the insulating tube exceeds the fracture of the outer sheath 5 by about 25 mm).

Referring to fig. 3, the exposed outer semiconductive water-resistant layer was completely removed, and then the bare copper wire was wrapped with an electric tape. And a layer of electrical adhesive tape is wound at the position 120mm below the fracture of the outer sheath 5 to be used as a positioning mark for installing the cold shrink tube.

Referring to fig. 4, the retained tightening copper strip 6 is lapped and wound on the outer semi-conductive layer of the cable with the self-bandwidth of 1/3-1/2 to form a tightening copper strip 6 layer. The length of 6 layers of the wound tightened copper strips is more than 100 mm. And then tightly winding a layer of semi-conductive self-adhesive tape thereon. And the end of the collected metal wire is pressed and connected with the grounding terminal.

In this embodiment, a metal armor layer is disposed between the inner insulating sheath 4 and the outer sheath 5. The armor can be steel band or steel wire, and high tension cable mainly plays the effect of protection cable in addition to the armor, and high tension steel band armoured cable can bear certain mechanical pressure, is fit for buried directly in the ground and lays, and high tension steel wire armoured cable then can bear corresponding pulling force, can be used to the short distance and make somebody a mere figurehead and lay perpendicularly.

In order to prevent electric leakage and perform an insulating function, the anti-leakage grounding wire further comprises an insulating tape layer 7, and the insulating tape layer 7 wraps part of the insulating inner sheath 4 and the grounding wire 3. The insulating tape layer 7 consists of a base band and a pressure-sensitive adhesive layer; the base belt is generally made of cotton cloth, synthetic fiber fabric, plastic film and the like, and the adhesive layer is made of compounding agents such as rubber and tackifying resin and the like, so that the base belt is good in viscosity and excellent in insulating property. The insulating tape layer 7 has the characteristics of good insulation, voltage resistance, flame retardance, weather resistance and the like, and is suitable for wire connection, electrical insulation protection and the like.

Specifically, the distance between the insulating tape layer 7 and the inner insulating sheath 4 is 80mm to 150 mm. The 6 layers of the tightening copper strips are close to the insulating tape layer 7 and wrap the conductive buffer layer 2 along the direction far away from the insulating inner sheath 4.

In order to ensure tight winding, the 6 layers of the fastening copper strips are formed in an overlapping winding mode with the width of the copper strips of 1/3-1/2. In addition, 6 layers of the tightening copper strip are externally provided with a semi-conductive self-adhesive tape layer. The semi-conductive self-adhesive tape layer is formed by winding a semi-conductive self-adhesive tape, and the semi-conductive self-adhesive tape is mainly used for manufacturing a shielding layer at a rubber and plastic insulated cable terminal and a joint and can also be used for shielding structures required by other facilities. The semiconductive adhesive tape is a semiconductive ethylene propylene rubber insulating adhesive tape with high flexibility, does not need vulcanization, has stable performance, keeps stable conductivity in a wide use temperature range, is influenced by low-viscosity oil, and does not influence the conductivity of a cable semiconductive layer.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A metal shielded cable, comprising: the cable comprises a conductor, a conductive buffer layer, a grounding wire, an insulating inner sheath and an outer sheath;

2. The metal shielded cable of claim 1 wherein said ground conductor is stranded of a plurality of metallic copper wires.

3. The metal shielded cable of claim 2, wherein the ground conductor and the ground terminal are fixed by crimping.

4. The metal shielded cable of claim 1, wherein a metal armor layer is disposed between the inner and outer insulative sheaths.

5. The metallic shielded cable of claim 1, further comprising a layer of insulating tape, the layer of insulating tape wrapping portions of the inner insulating jacket and the ground conductors.

6. The metallic shielded cable of claim 5, wherein the insulating tape layer is spaced apart from the insulating inner sheath by a distance of 80mm to 150 mm.

7. The metallic shielded cable of claim 5 further comprising a tie-down copper tape layer covering said conductive buffer layer proximate said insulating tape layer in a direction away from said insulating inner jacket.

8. The metal shielded cable of claim 7, wherein said tightening copper tape layer is formed by overlapping winding of the tightening copper tape itself in width of 1/3-1/2.

9. The metal shielded cable of claim 8, wherein the tightening copper tape layer is externally provided with a semi-conductive self-adhesive tape layer.