CN216697934U

CN216697934U - Novel waterproof crosslinked polyethylene insulated power cable

Info

Publication number: CN216697934U
Application number: CN202122300421.4U
Authority: CN
Inventors: 石彦良; 孙国刚
Original assignee: Liaoning Jiayi Cable Co ltd
Current assignee: Liaoning Jiayi Cable Co ltd
Priority date: 2021-09-22
Filing date: 2021-09-22
Publication date: 2022-06-07
Anticipated expiration: 2031-09-22

Abstract

The utility model discloses a novel waterproof crosslinked polyethylene insulated power cable which comprises a conductive wire core, wherein an insulating layer is arranged on the surface of the conductive wire core, a flame-retardant layer is arranged on the outer side of the insulating layer, a waterproof layer is arranged on the outer side of the flame-retardant layer, and an extruded halogen-free flame-retardant outer sheath is arranged on the outer side of the waterproof layer. The utility model has the function of transmitting electric energy by arranging the conductive wire core, the conductive wire core can be a round solid core or a multi-core round twisted together and is generally an annealed copper conductor, the insulating layer is insulated by crosslinked polyethylene, the crosslinked polyethylene is formed by one-time extrusion, the molecular structure of the crosslinked polyethylene is changed into a three-dimensional net structure from a linear structure, the waterproof performance and the electric insulating performance of the cable are fully ensured, and the problem that the service life of the cable is reduced due to the rapid reduction of the waterproof performance index of the cable along with the time extension in the actual use process is solved.

Description

Novel waterproof crosslinked polyethylene insulated power cable

Technical Field

The utility model relates to the technical field of insulated power cables, in particular to a novel waterproof crosslinked polyethylene insulated power cable.

Background

At present, city construction in China enters a rapid development stage, which brings development good opportunity for development of electric wires and cables, China is a large electric wire and cable manufacturing country, certain production experience has been accumulated through introduction, digestion and innovation for decades, the national standard is mostly revised by citing international universal standards, the technical requirements of the produced electric wires and cables are not much different from those of products for subways, the requirements of halogen free, low halogen, flame retardant, fire resistance, water blocking and the like are increased according to different use environments of the electric wires and cables except the national standard requirements, but in the waterproof aspect, in the actual use process, along with the time extension, the performance index is sharply reduced, and the index cannot meet the requirement of the design service life of the cable.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a novel waterproof crosslinked polyethylene insulated power cable which has the advantage of waterproofness and solves the problem that the service life of the cable is shortened due to the fact that the waterproof performance index of the cable is sharply reduced along with the time extension in the actual use process.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a novel waterproof crosslinked polyethylene insulated power cable, includes conductive core, conductive core's surface is provided with the insulating layer, the outside of insulating layer is provided with fire-retardant layer, fire-retardant layer's the outside is provided with the waterproof layer, the outside of waterproof layer is provided with crowded package and does not have steamed fire-retardant oversheath, fire-retardant layer is including there is not steamed fire-retardant filling layer, the outside of steamed fire-retardant filling layer is provided with high temperature resistant and does not have steamed fire-retardant band layer, the waterproof layer is including wrapping the water-blocking area, be provided with crowded package waterproof layer around the outside of wrapping the water-blocking area, the material of insulating layer adopts crosslinked polyethylene resin.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model has the function of transmitting electric energy by arranging the conductive wire core, the conductive wire core can be a round solid core or a multi-core round twisted together and is generally an annealed copper conductor, the insulating layer is insulated by crosslinked polyethylene, the crosslinked polyethylene is formed by one-time extrusion, the molecular structure of the crosslinked polyethylene is changed into a three-dimensional net structure from a linear structure, the waterproof performance and the electric insulating performance of the cable are fully ensured, and the problem that the service life of the cable is reduced due to the rapid reduction of the waterproof performance index of the cable along with the time extension in the actual use process is solved.

2. The utility model has the advantages that the halogen-free flame-retardant filling layer and the high-temperature resistant halogen-free flame-retardant wrapping tape layer are arranged to be matched with each other to play a flame-retardant role on the conductive wire core, so that the flame-retardant effect of the conductive wire core is improved, the wrapping waterproof tape and the extrusion waterproof layer are arranged to be matched with each other to play a protective role and ensure the installation and use of the cable, the insulating layer is arranged to serve as an outer sheath for protecting the product, the environment-friendly halogen-free low-smoke flame-retardant material is adopted for extrusion molding, so that the metal sheath can be protected to adapt to various corrosive places, and the environment, underground water and other resources are not influenced.

Drawings

FIG. 1 is a schematic cross-sectional view of a conductive core according to the present invention;

FIG. 2 is a schematic cross-sectional view of a flame retardant layer according to the utility model;

fig. 3 is a schematic view of a waterproof layer cross-sectional structure according to the present invention.

In the figure: 1. a conductive wire core; 2. an insulating layer; 3. a flame retardant layer; 31. a halogen-free flame-retardant filler layer; 32. a high-temperature resistant halogen-free flame-retardant belting layer; 4. a waterproof layer; 41. wrapping a water blocking tape; 42. extruding and wrapping a waterproof layer; 5. and extruding and wrapping the halogen-free flame-retardant outer sheath.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below 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 description herein, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings to facilitate the description of the patent and to simplify the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be considered limiting of the patent. In the description of the present application, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can be, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by one of ordinary skill in the art as appropriate.

Referring to fig. 1-3, a novel waterproof crosslinked polyethylene insulated power cable comprises a conductive wire core 1, an insulating layer 2 is disposed on the surface of the conductive wire core 1, a flame retardant layer 3 is disposed on the outer side of the insulating layer 2, a waterproof layer 4 is disposed on the outer side of the flame retardant layer 3, a halogen-free flame retardant outer sheath 5 is disposed on the outer side of the waterproof layer 4, the conductive wire core 1 is arranged to transmit electric energy, the conductive wire core 1 can be a round solid core or a multi-core round twisted together, and is generally an annealed copper conductor, the insulating layer 2 is insulated by crosslinked polyethylene, the crosslinked polyethylene is formed by once extrusion, the molecular structure of the crosslinked polyethylene is changed from a linear structure to a three-dimensional mesh structure, so as to sufficiently ensure the waterproof performance and the electrical insulation performance of the cable, the flame retardant layer 3 comprises a halogen-free flame retardant filling layer 31, and a high temperature resistant halogen-free flame retardant wrapping layer 32 is disposed on the outer side of the halogen-free flame retardant filling layer 31, through setting up halogen-free flame retardant filling layer 31 and high temperature resistant halogen-free flame retardant band layer 32 mutually support and be used for playing fire-retardant effect to conductive core 1, improve conductive core 1's flame retardant efficiency, waterproof layer 4 is including wrapping waterproofing strip 41, be provided with crowded package waterproof layer 42 around the outside of wrapping waterproofing strip 41, can play the guard action through setting up mutually supporting around wrapping waterproofing strip 41 and crowded package waterproof layer 42, can guarantee the cable installation again and use, insulating layer 2's material adopts crosslinked polyethylene resin, be used for as the oversheath of product protection through setting up insulating layer 2, adopt the crowded package shaping of the halogen-free low smoke fire-retardant type material of environmental protection, can protect the place that metal sheath can adapt to various corrosivity, also do not have any influence to resources such as environment and groundwater simultaneously.

When the cable is used, the conductive wire core 1 plays a role in transmitting electric energy, the conductive wire core 1 can be a round solid core or a multi-core round twisted together and is generally an annealed copper conductor, the insulating layer 2 is insulated by crosslinked polyethylene, the crosslinked polyethylene is formed by one-time extrusion, the molecular structure of the polyethylene is changed into a three-dimensional net structure from a linear structure after being crosslinked, and the waterproof performance and the electric insulation performance of the cable are fully ensured.

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 utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a novel waterproof crosslinked polyethylene insulation power cable, includes conductive core (1), its characterized in that: the surface of the conductive wire core (1) is provided with an insulating layer (2), the outer side of the insulating layer (2) is provided with a flame-retardant layer (3), the outer side of the flame-retardant layer (3) is provided with a waterproof layer (4), the outer side of the waterproof layer (4) is provided with an extruded halogen-free flame-retardant outer sheath (5), the flame-retardant layer (3) comprises a halogen-free flame-retardant filling layer (31), the outer side of the halogen-free flame-retardant filling layer (31) is provided with a high-temperature-resistant halogen-free flame-retardant wrapping tape layer (32), the waterproof layer (4) comprises a wrapped waterproof tape (41), the outer side of the wrapped waterproof tape (41) is provided with an extruded waterproof layer (42), and the insulating layer (2) is made of cross-linked polyethylene resin.