CN210349423U

CN210349423U - Crosslinked polyethylene insulated power cable

Info

Publication number: CN210349423U
Application number: CN201921158521.4U
Authority: CN
Inventors: 赵启年; 安学军
Original assignee: Western Cable Shaanxi Co Ltd
Current assignee: Western Cable Shaanxi Co Ltd
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2020-04-17
Anticipated expiration: 2029-07-23

Abstract

The utility model provides a crosslinked polyethylene insulated power cable, which comprises a plurality of conductors, wherein the outer surfaces of the conductors are all wrapped with an insulating shielding layer, the outer surface of the insulating shielding layer is all wrapped with an insulating oily flame-retardant layer, the outer surface of the insulating oily flame-retardant layer is all wrapped with a waterproof filling layer, the outer surface of the waterproof filling layer is wrapped with a crosslinked polyethylene insulating layer, the outer surface of the crosslinked polyethylene insulating layer is wrapped with an impact-resistant layer, the outer surface of the impact-resistant layer is wrapped with an outer protective layer, the cable conductor part is wrapped by the arranged insulating oily flame-retardant layer, so that the crosslinked polyethylene insulated power cable can extinguish the arc of the conductor part through insulating oil when the electric arc is generated by internal short circuit, the crosslinked polyethylene insulated power cable can not burn, and the influence on the internal conductor is reduced when the cable is impacted through the arranged impact-resistant layer, the service life of the crosslinked polyethylene insulated power cable is prolonged.

Description

Crosslinked polyethylene insulated power cable

Technical Field

The utility model relates to the technical field of cables, specifically be crosslinked polyethylene insulated power cable.

Background

Along with the development of society, cities are larger and larger, the power load is higher and higher, the safety requirement of power supply is more and more important, the power supply lines of the cities are more and more dense and more complex, and meanwhile, the cities are required to be as beautiful as possible due to the requirement of city appearance, overhead lines are not adopted as much as possible, and cables are adopted as much as possible to enter the ground; based on the reasons, ultrahigh-voltage cross-linked polyethylene cables are widely adopted in large-scale and extra-large-scale cities at present, and large-capacity electric energy is conveyed underground to meet the demand of densely-populated electric power consumption of the cities. At the temperature of more than 200 ℃, the wire insulation becomes abnormally soft, the wire is extruded and collided by external force, the cut-through short circuit of the wire can not supply power normally, and the service life of the crosslinked polyethylene insulated power cable is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a crosslinked polyethylene insulated power cable to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the cross-linked polyethylene insulated power cable comprises a plurality of conductors, an insulation shielding layer is wrapped on the outer surface of each conductor, an insulation oily flame-retardant layer is wrapped on the outer surface of the insulation shielding layer, a waterproof filling layer is wrapped on the outer surface of the insulation oily flame-retardant layer, a cross-linked polyethylene insulating layer is wrapped on the outer surface of the waterproof filling layer, an impact-resistant layer is wrapped on the outer surface of the cross-linked polyethylene insulating layer, and an outer protective layer is wrapped on the outer surface of the impact-resistant layer.

Preferably, the insulating oily flame-retardant layer comprises an inner insulating flame-retardant layer and an outer insulating flame-retardant layer, the inner insulating flame-retardant layer wraps the outer surface of the insulating shielding layer, the outer surface of the outer insulating flame-retardant layer wraps the waterproof filling layer, and insulating oil is filled between the inner insulating flame-retardant layer and the outer insulating flame-retardant layer.

Preferably, the impact resistant layer comprises an inner rubber layer, a plurality of metal compression rings are fixedly connected to the outer surface of the inner rubber layer, the surfaces of the metal compression rings are fixedly connected with the inner surface of the outer rubber layer, the surface of the inner rubber layer is wrapped with a cross-linked polyethylene insulating layer, and the outer surface of the outer rubber layer is wrapped with an outer protective layer.

Preferably, the insulating oil is made of mineral insulating oil.

Preferably, the gap between the metal compression rings is smaller than the width of the metal compression rings, and the metal compression rings are made of aluminum alloy.

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

1. the utility model discloses a crosslinked polyethylene insulation power cable, the utility model discloses a fire-retardant layer of insulating oily of setting wraps up cable conductor part, makes crosslinked polyethylene insulation power cable carry out the arc extinguishing to conductor part through insulating oil when inside short circuit produces electric arc for crosslinked polyethylene insulation power cable can not burn.

2. The utility model discloses a shock resistance layer that sets up for the cable is receiving the impact and reducing the influence to inside conductor, has improved crosslinked polyethylene insulation power cable's life.

Drawings

Fig. 1 is a schematic sectional structure of the present invention;

FIG. 2 is a schematic view of the structure of the anti-impact layer of the present invention;

fig. 3 is an enlarged view of a portion a of fig. 1.

In the figure: 1. a conductor; 2. an insulating shield layer; 3. an insulating oily flame-retardant layer; 31. an inner insulating flame retardant layer; 32. insulating oil; 33. an outer insulating flame retardant layer; 4. a waterproof filler layer; 5. a crosslinked polyethylene insulating layer; 6. an impact resistant layer; 61. an inner rubber layer; 62. a metal anti-pressure ring; 63. an outer rubber layer; 7. and an outer protective layer.

Detailed Description

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.

Referring to fig. 1-3, the present invention provides a technical solution: crosslinked polyethylene insulated power cable, including a plurality of conductors 1, all the parcel has insulation shield 2 on conductor 1's the surface, all the parcel has insulating oily fire-retardant layer 3 on insulation shield 2's the surface, all the parcel has waterproof filling layer 4 on the surface of insulating oily fire-retardant layer 3, the parcel has crosslinked polyethylene insulating layer 5 on waterproof filling layer 4's the surface, the parcel has impact resistance 6 on crosslinked polyethylene insulating layer 5's the surface, the parcel has outer protective layer 7 on impact resistance 6's the surface.

The insulating oily flame-retardant layer 3 comprises an inner insulating flame-retardant layer 31 and an outer insulating flame-retardant layer 33, the inner insulating flame-retardant layer 31 is wrapped on the outer surface of the insulating shielding layer 2, a waterproof filling layer 4 is wrapped on the outer surface of the outer insulating flame-retardant layer 33, and insulating oil 32 is filled between the inner insulating flame-retardant layer 31 and the outer insulating flame-retardant layer 33.

The impact resistant layer 6 comprises an inner rubber layer 61, a plurality of metal compression rings 62 are fixedly connected to the outer surface of the inner rubber layer 61, the surfaces of the metal compression rings 62 are fixedly connected with the inner surface of an outer rubber layer 63, the surface of the inner rubber layer 61 is wrapped with a cross-linked polyethylene insulating layer 5, and the outer surface of the outer rubber layer 63 is wrapped with an outer protective layer 7.

The insulating oil 32 is made of mineral insulating oil.

The gap between the metal compression rings 62 is smaller than the width of the metal compression rings 62, and the metal compression rings 62 are made of aluminum alloy.

Specifically, insulating oily fire-retardant layer 3 wraps up cable conductor 1 part, make crosslinked polyethylene insulated power cable take place the short circuit in inside, conductor 1 produces electric arc and carries out the arc extinguishing through insulating oil 32 to conductor 1 part when puncturing insulating shielding layer 2, make crosslinked polyethylene insulated power cable can not cause the burning by the internal short circuit, prevent to initiate bigger conflagration, when crosslinked polyethylene insulated power cable is receiving the impact, through inner rubber layer 61, the impact absorption that will receive of outer rubber layer 63 and inside metal resistance to compression ring 62, reduce the holistic influence to crosslinked polyethylene insulated power cable, and then reduce the influence to conductor 1, the life of crosslinked polyethylene insulated power cable has been improved.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", 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 simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second", "third", "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", "fourth" may explicitly or implicitly include at least one such feature.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The cross-linked polyethylene insulated power cable is characterized by comprising a plurality of conductors (1), an insulating shielding layer (2) is wrapped on the outer surface of each conductor (1), an insulating oily flame-retardant layer (3) is wrapped on the outer surface of each insulating shielding layer (2), a waterproof filling layer (4) is wrapped on the outer surface of each insulating oily flame-retardant layer (3), a cross-linked polyethylene insulating layer (5) is wrapped on the outer surface of each waterproof filling layer (4), an impact-resistant layer (6) is wrapped on the outer surface of each cross-linked polyethylene insulating layer (5), and an outer protective layer (7) is wrapped on the outer surface of each impact-resistant layer (6).

2. The cross-linked polyethylene insulated power cable according to claim 1, characterized in that: the insulating oily flame-retardant layer (3) comprises an inner insulating flame-retardant layer (31) and an outer insulating flame-retardant layer (33), the inner insulating flame-retardant layer (31) wraps the outer surface of the insulating shielding layer (2), the outer surface of the outer insulating flame-retardant layer (33) is wrapped with a waterproof filling layer (4), and insulating oil (32) is filled between the inner insulating flame-retardant layer (31) and the outer insulating flame-retardant layer (33).

3. The cross-linked polyethylene insulated power cable according to claim 1, characterized in that: the shock-resistant layer (6) comprises an inner rubber layer (61), a plurality of metal compression rings (62) are fixedly connected to the outer surface of the inner rubber layer (61), the surfaces of the metal compression rings (62) are fixedly connected with the inner surface of an outer rubber layer (63), the surface of the inner rubber layer (61) is wrapped with a cross-linked polyethylene insulating layer (5), and the outer surface of the outer rubber layer (63) is wrapped with an outer protective layer (7).

4. The cross-linked polyethylene insulated power cable according to claim 2, characterized in that: the insulating oil (32) is made of mineral insulating oil.

5. A crosslinked polyethylene insulated power cable according to claim 3, characterized in that: the gap between the metal compression rings (62) is smaller than the width of the metal compression rings (62), and the metal compression rings (62) are made of aluminum alloy.