Aluminum lapped cable

Abstract

The utility model discloses an aluminum lapped cable, and belongs to the technical field of cables. The cable comprises a conductive wire strand, a shielding layer sleeving the wire strand, and a protective layer sleeving the wire strand, the shielding layer sleeves the wire strand, the shielding layer is used for isolating an electromagnetic field generated by the wire strand from an external electromagnetic field, and the protective layer sleeves the wire strand. The protective layer is used for isolating current passing through the wire strand from the outside, the wire strand is sleeved with a semi-conductive buffer strip, the semi-conductive buffer strip is sleeved with an aluminum foil strip, and the aluminum foil strip is sleeved with a corrugated aluminum sleeve. The conductor strands can conduct electricity, the protective layer can isolate current passing through the conductor strands from the outside, the shielding layer can isolate an electromagnetic field generated by the conductor strands from an external electromagnetic field, and the aluminum foil belt is arranged outside the semi-conductive buffer belt in a sleeving mode and forms a conductive bridge. The electric contact between the semi-conductive buffer strip and the corrugated aluminum sleeve is tighter and more uniform, the tight contact is beneficial to reducing the contact resistance, and the current transmission efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of cables, in particular to an aluminum-wound cable. BACKGROUND

[0002] A cable is a device for transmitting electric energy or signals, and is usually composed of a conductor, an insulation layer and a shielding layer.

[0003] In the related art, a semi-conductive buffer tape is usually sleeved outside the wire strand, a metal braid layer is sleeved on the semi-conductive buffer tape, and a corrugated aluminum sleeve is sleeved outside the metal braid layer, or the metal braid layer is not provided, and the semi-conductive buffer tape and the corrugated aluminum sleeve are not in close contact with each other due to the absence of the metal braid layer or the sparse copper wire braid structure of the metal braid layer, so that the cable is easily ablated. CONTENT OF THE UTILITY MODEL

[0004] The application aims to solve the above problems in the prior art and provides an aluminum-wound cable.

[0005] The application can be implemented by the following technical scheme: an aluminum-wound cable, comprising a wire strand capable of conducting electricity, a shielding layer sleeved on the wire strand, and a protective layer sleeved on the wire strand, the shielding layer is used for isolating the electromagnetic field generated by the wire strand from the external electromagnetic field, and the protective layer is used for isolating the current passing through the wire strand from the outside, the wire strand is sleeved with a semi-conductive buffer tape, the semi-conductive buffer tape is sleeved with an aluminum foil tape, and the aluminum foil tape is sleeved with a corrugated aluminum sleeve.

[0006] In the above technical scheme, the wire strand can conduct electricity, the protective layer can isolate the current passing through the wire strand from the outside, and the shielding layer can isolate the electromagnetic field generated by the wire strand from the external electromagnetic field; by sleeving the semi-conductive buffer tape with an aluminum foil tape, the aluminum foil tape forms a conductive bridge, so that the semi-conductive buffer tape and the corrugated aluminum sleeve are in close and uniform contact, and such close contact helps to reduce the contact resistance and improve the efficiency of current transmission.

[0007] Further, the corrugated aluminum sleeve is sleeved with an asphalt layer.

[0008] In the above technical scheme, the asphalt layer can protect the corrugated aluminum sleeve so that the corrugated aluminum sleeve is not easily corroded, thereby prolonging the service life of the cable.

[0009] Further, the shielding layer is a semi-conductive Teflon tape.

[0010] In the above technical scheme, the semi-conductive Teflon tape can play a shielding role, and it can effectively prevent electromagnetic interference and protect the signal transmission inside the cable from external interference, thereby ensuring stable signal transmission.

[0011] Further, a semi-conductive shielding layer is sleeved on the wire strand.

[0012] In the above technical solution, the semi-conductive shielding layer has multiple effects of uniform electric field distribution in the cable structure, improving the electric field distribution of the cable, etc.

[0013] Further, the protective layer comprises a cross-linked polyethylene insulation layer and an outer sheath layer, and the outer sheath layer is sleeved on the shielding layer.

[0014] In the above technical solution, the cross-linked polyethylene has good insulation performance, which can isolate the current passing through the wire strand from the outside.

[0015] Further, the semi-conductive shielding layer is provided with two layers, and the cross-linked polyethylene insulation layer is arranged between the two layers of semi-conductive shielding layer.

[0016] In the above technical solution, by arranging the cross-linked polyethylene insulation layer between the two semi-conductive shielding layers, the effects of optimizing the electric field distribution, improving the reliability and safety of the cable, and protecting the cross-linked polyethylene insulation layer can be achieved.

[0017] Further, the material of the wire strand is copper.

[0018] In the above technical solution, copper can conduct electricity.

[0019] Further, the outer sheath layer is a polyethylene sheath layer.

[0020] In the above technical solution, the polyethylene sheath layer has the advantages of good hydrolysis resistance, good environmental stress cracking resistance, good flexibility, and good low temperature resistance.

[0021] Further, the outer sheath layer is a polyvinyl chloride sheath layer.

[0022] In the above technical solution, the polyvinyl chloride sheath layer has the characteristics that the flame retardance is better than that of the polyethylene sheath layer, and also has good mechanical strength and wear resistance.

[0023] Further, the outer sheath layer is sleeved with a conductive layer.

[0024] In the above technical solution, the staff can use the conductive layer for on-site testing, such as testing the insulation performance of the outer sheath layer.

[0025] In summary, the application has the following technical effects: the wire strand can conduct electricity, the protective layer can isolate the current passing through the wire strand from the outside, and the shielding layer can isolate the electromagnetic field generated by the wire strand from the external electromagnetic field. By sleeving the semi-conductive buffer tape with an aluminum foil tape, the aluminum foil tape forms a conductive bridge, making the electrical contact between the semi-conductive buffer tape and the corrugated aluminum sleeve more close and uniform. This close contact helps to reduce the contact resistance and improve the efficiency of current transmission. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall structure of the application.

[0027] BRIEF DESCRIPTION OF DRAWINGS:

[0028] 1, wire strand; 2, shielding layer; 3, protective layer; 31, cross-linked polyethylene insulation layer; 32, outer sheath layer; 4, semi-conductive buffer tape; 5, aluminum foil tape; 6, corrugated aluminum sleeve; 7, asphalt layer; 8, semi-conductive shielding layer; 9, conductive layer. DETAILED DESCRIPTION

[0029] Referring to the drawings of the specification Figure 1 , one embodiment of the application provides an aluminum-wrapped cable, which comprises a wire strand 1, the material of the wire strand 1 is copper, the wire strand 1 is sleeved with a shielding layer 2 and a protective layer 3, the shielding layer 2 is used to isolate the electromagnetic field generated by the wire strand 1 from the external electromagnetic field, and the protective layer 3 is used to isolate the current passing through the wire strand 1 from the outside. The wire strand 1 is attached to the shielding layer 2, and the shielding layer 2 is a semi-conductive Teflon tape, which can play a shielding role and effectively prevent electromagnetic interference.

[0030] Referring to the drawings of the specification Figure 1 , a semi-conductive shielding layer 8 is attached to the outer surface of the shielding layer 2, the semi-conductive shielding layer 8 has multiple functions such as uniform electric field distribution and improving the electric field distribution of the cable, and there are two layers of semi-conductive shielding layer 8, the protective layer 3 comprises a cross-linked polyethylene insulation layer 31 and an outer sheath layer 32, the cross-linked polyethylene insulation layer 31 is located between the two layers of semi-conductive shielding layer 8, and the two layers of semi-conductive shielding layer 8 are attached to the inner and outer surfaces of the cross-linked polyethylene insulation layer 31 respectively, the material of the semi-conductive shielding layer 8 is semi-conductive cross-linked polyethylene, and the purity and cleanliness of the semi-conductive shielding layer 8 close to the shielding layer 2 are higher than those of the semi-conductive shielding layer 8 away from the shielding layer 2.

[0031] Referring to the drawings of the specification Figure 1, far from the outer surface of the semiconductive shielding layer 8 of the shielding layer 2, a semiconductive buffer tape 4 is arranged in close contact, the semiconductive buffer tape 4 is a semiconductive buffer water-blocking tape, the material of the semiconductive buffer tape 4 is a two-layer non-woven fabric tape with a layer of expanded water-blocking powder and graphite in between. The outer surface of the semiconductive buffer tape 4 is arranged in close contact with a layer of aluminum foil tape 5, the outer surface of the aluminum foil tape 5 is arranged in close contact with a corrugated aluminum sleeve 6, the outer surface of the corrugated aluminum sleeve 6 is arranged in close contact with an asphalt layer 7. Compared with the metal braid layer or no metal braid layer outside the semiconductive buffer tape 4, the aluminum foil tape 5 forms a conductive bridge, making the electrical contact between the semiconductive buffer tape 4 and the corrugated aluminum sleeve 6 more closely and uniformly. This close contact helps to reduce the contact resistance and improve the efficiency of current transmission. The asphalt layer 7 can protect the corrugated aluminum sleeve 6 from corrosion, prolonging the service life of the cable.

[0032] Please refer to the drawings of the specification Figure 1 , the outer surface of the asphalt layer 7 is arranged in close contact with an outer sheath layer 32, which can be a polyethylene sheath layer or a polyvinyl chloride sheath layer. When using a polyethylene sheath layer, a conductive layer 9 made of semiconductive polyethylene can be provided outside the polyethylene sheath layer; when using a polyvinyl chloride sheath layer, a conductive layer 9 made of semiconductive polyvinyl chloride can be provided outside the polyvinyl chloride sheath layer. The staff can use the conductive layer 9 for on-site testing, such as testing the insulation performance of the outer sheath layer 32.

[0033] The working principle of the embodiment is as follows: the wire strand 1 can conduct electricity, the protective layer 3 can isolate the current passing through the wire strand 1 from the outside, and the shielding layer 2 can isolate the electromagnetic field generated by the wire strand 1 from the external electromagnetic field. By providing a layer of aluminum foil tape 5 outside the semiconductive buffer tape 4, compared with the metal braid layer or no metal braid layer outside the semiconductive buffer tape 4, the aluminum foil tape 5 forms a conductive bridge, making the electrical contact between the semiconductive buffer tape 4 and the corrugated aluminum sleeve 6 more closely and uniformly. This close contact helps to reduce the contact resistance and improve the efficiency of current transmission.

[0034] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application shall be covered within the protection scope of the present application.

Claims

1. An aluminium cable, characterized in that The utility model relates to a kind of cable, including the electrically conductive conductor strand (1), shielding layer (2) of being set in conductor strand (1), and protective layer (3) of being set in conductor strand (1), the shielding layer (2) is used to isolate the electromagnetic field generated by conductor strand (1) and external electromagnetic field, the protective layer (3) is used to isolate the current passing through conductor strand (1) and external, the conductor strand (1) is set with semiconductive buffer tape (4), the semiconductive buffer tape (4) is set with aluminium foil tape (5), the aluminium foil tape (5) is set with corrugated aluminium sleeve (6);The corrugated aluminium sleeve (6) is set with pitch layer (7).

2. An aluminium wire screened cable according to claim 1, characterised in that, The shielding layer (2) is a semiconductive teflon tape.

3. An aluminium wire screened cable according to claim 1, characterised in that, Further comprising semiconductive shielding layer (8), the semiconductive shielding layer (8) is set in conductor strand (1).

4. An aluminium wire screened cable according to claim 1, characterised in that, The conductor strand (1) is made of copper.

5. An aluminium wire screened cable according to claim 3, characterised in that, The protective layer (3) includes a cross-linked polyethylene insulation layer (31) and an outer sheath layer (32), and the outer sheath layer (32) is set on the shielding layer (2).

6. An aluminium wire screened cable according to claim 5, characterised in that, The semiconductive shielding layer (8) has two layers, and the cross-linked polyethylene insulation layer (31) is arranged between the two layers of semiconductive shielding layer (8).

7. An aluminium wire screened cable according to claim 5, characterised in that, The outer sheath layer (32) is a polyethylene sheath layer.

8. An aluminium wire screened cable according to claim 5, characterised in that, The outer sheath layer (32) is a polyvinyl chloride sheath layer.

9. An aluminium wire screened cable according to claim 5, characterised in that, The outer sheath layer (32) is set with a conductive layer (9).

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