CN212516673U

CN212516673U - Cable with improved insulation

Info

Publication number: CN212516673U
Application number: CN202020939640.XU
Authority: CN
Inventors: 何达峰
Original assignee: Hongsheng Wire & Cable Co ltd
Current assignee: Hongsheng Wire & Cable Co ltd
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2021-02-09
Anticipated expiration: 2030-05-28

Abstract

The utility model discloses a cable, including the wire main part, be provided with crowded package semi-conducting layer outside the wire main part, be provided with a plurality of archs in the outside of crowded package semi-conducting layer the skin of crowded package semi-conducting layer is provided with the insulating layer, the insulating layer with the protruding laminating each other the outside of insulating layer is provided with the semi-conducting layer, still is provided with the back up coat in the outside of semi-conducting layer. The phenomena of uneven current distribution and reduced current carrying capacity of the conductor due to the skin effect can be effectively reduced, the effective use area of the cable conductor is increased, and the current carrying capacity of the cable is improved.

Description

Cable with improved insulation

Technical Field

The utility model relates to a wire and cable technical field refers in particular to a cable.

Background

When the cable transmits alternating current, the current transmitted by the cable is not proportionally increased along with the increase of the cross section of the cable due to eddy loss, when the cross section of the cable is larger, the current passing through the inside of the conductor is not uniformly distributed, the central part of the lead does not carry current, and only the peripheral part of the lead carries current. This phenomenon of current conduction concentrated at the skin site outside the wire is known as the skin effect. Due to the skin effect phenomenon, the current-carrying capacity of the cable is greatly reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a cable has the advantage that improves the cable current-carrying capacity.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides a cable, includes the wire main part, is provided with crowded package semi-conducting layer outside the wire main part, is provided with a plurality of archs in the outside of crowded package semi-conducting layer the skin of crowded package semi-conducting layer is provided with the insulating layer, the insulating layer with protruding laminating each other the outside of insulating layer is provided with the semi-conducting layer, still is provided with the reinforced layer in the outside of semi-conducting layer. The phenomena of uneven current distribution and reduced current carrying capacity of the conductor due to the skin effect can be effectively reduced, the effective use area of the cable conductor is increased, and the current carrying capacity of the cable is improved.

Preferably, the thickness of the insulating layer is set to 15mm to 30mm, so that the cable can withstand high voltage.

Preferably, the semi-conductive layer adopts a semi-conductive water-blocking expansion type tape, the semi-conductive water-blocking expansion type tape is arranged into 2-3 layers, and the thickness of the semi-conductive layer is 2 mm. The cable has the advantages of water resistance, buffering of the impact of the cable core when the cable is subjected to external force, protection of the insulated cable core and long service life.

Preferably, a ceramic plastic layer is arranged outside the reinforcing layer. The cable is vitrified in a flame combustion environment, and insulation and isolation of the cable in a high-temperature environment are formed.

Preferably, the conductor body comprises a number of individual wires formed by stranding.

To sum up, the utility model discloses following beneficial effect has:

1. the phenomena of uneven current distribution and reduced current carrying capacity of the conductor due to the skin effect are effectively reduced, the effective use area of the cable conductor is increased, and therefore the current carrying capacity of the cable is improved.

2. The semi-conductive layer blocks water and buffers the impact of the wire core when the cable is subjected to external force, so that the insulated wire core is protected, and the service life is long.

3. The ceramic plastic layer is arranged, the cable is ceramic in a flame combustion environment, the insulation isolation of the cable in a high-temperature environment is formed, the cable is protected, and the service life is prolonged.

Drawings

Fig. 1 is a first cross-sectional view of the cable of the embodiment.

Fig. 2 is a sectional view of the cable in the second embodiment.

In the figure, 1, a lead body; 2. extruding a semi-conductive layer; 3. an insulating layer; 4. a semiconducting layer; 5. a reinforcement layer; 6. a ceramic plastic layer; 7. and (4) protruding.

Detailed Description

The invention is further described below in terms of specific examples.

A cable comprises a lead body 1, wherein a wrapped semi-conducting layer 2, an insulating layer 3, a semi-conducting layer 4 and a reinforcing layer 5 are sequentially arranged outside the lead body 1, so that the phenomena of uneven current distribution and reduced current carrying capacity of a conductor due to the skin effect can be effectively reduced, the effective use area of the cable conductor is increased, and the current carrying capacity of the cable is improved.

The outer side of the extruded semi-conducting layer 2 is provided with a plurality of bulges 7, the insulating layer 3 is attached to the bulges 7, and the thickness of the insulating layer 3 is set to be 15mm-30mm, so that the cable can bear high voltage.

The semi-conducting layer 4 adopts a semi-conducting water-blocking expansion type wrapping tape, the semi-conducting water-blocking expansion type wrapping tape is arranged into 2-3 layers, and the thickness of the semi-conducting layer 4 is 2 mm. The cable has the advantages of water resistance, buffering of the impact of the cable core when the cable is subjected to external force, protection of the insulated cable core and long service life.

And a ceramic plastic layer 6 is arranged outside the reinforcing layer 5, so that the cable is vitrified in a flame combustion environment, and the insulation and isolation of the cable in a high-temperature environment are formed. The cable is protected in a flame environment, and the service life is prolonged.

In order to increase the surface area of the conductor without increasing the cross section area of the lead main body 1, the conductor is divided into a plurality of parts, and each part of the conductor is externally provided with an insulating part; and the conductor main body 1 is formed by twisting a plurality of single wires, and an insulating part is arranged on the surface of each single wire. And filling ropes are arranged in gaps between the adjacent lead main bodies 1. The outside is equipped with around the covering with conductor and packing rope parcel, and the outside is equipped with the tegument.

The skin effect of the cable is that electric energy is only transmitted on the surface of the lead body 1, and the skin effect can be reduced by increasing the surface area of the lead body 1. Under the condition that the cross section area of the lead body 1 is not increased, in order to increase the surface area of the lead body 1, the lead body 1 is decomposed into a plurality of parts, each part is independent, and the outside of each part of conductor is insulated, so that the surface area of the conductor is actually increased, the skin effect is reduced, and the current-carrying capacity of the cable is improved.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A cable comprising a conductor body (1), characterized in that: be provided with crowded package semi-conductive layer (2) outside wire main part (1), be provided with a plurality of archs (7) in the outside of crowded package semi-conductive layer (2) the skin of crowded package semi-conductive layer (2) is provided with insulating layer (3), insulating layer (3) with protruding (7) are laminated each other the outside of insulating layer (3) is provided with semi-conductive layer (4), still is provided with reinforced layer (5) in the outside of semi-conductive layer (4).

2. A cable according to claim 1, wherein: the thickness of the insulating layer (3) is set to be 15mm-30 mm.

3. A cable according to claim 2, wherein: the semi-conductive layer (4) adopts a semi-conductive water-blocking expansion type wrapping tape.

4. A cable according to claim 3, wherein: the semi-conductive water-blocking expansion type wrapping tape is provided with 2-3 layers.

5. A cable according to claim 4, wherein: the thickness of the semiconducting layer (4) is set to 2 mm.

6. A cable according to claim 1, wherein: a ceramic plastic layer (6) is arranged outside the reinforcing layer (5).

7. A cable according to any one of claims 1 to 6, wherein: the conductor main body (1) comprises a plurality of single wires formed by stranding.