CN215496142U

CN215496142U - Crosslinked polyethylene insulated power cable

Info

Publication number: CN215496142U
Application number: CN202121482693.4U
Authority: CN
Inventors: 赵家玉; 曾晓辉
Original assignee: Anhui Tongling City Tongdou Special Cable Co ltd
Current assignee: Anhui Tongling City Tongdou Special Cable Co ltd
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2022-01-11
Anticipated expiration: 2031-06-29

Abstract

The utility model discloses a crosslinked polyethylene insulated power cable, and belongs to the field of power cables. A crosslinked polyethylene insulated power cable comprising: the cable comprises a cable body, a lead, a lining pipe and a conduit; the middle of the cable is provided with the lining pipe; a buffer layer is fixedly arranged on the outer side of the lining pipe; a groove is formed on one side, close to the buffer layer, of the lining pipe, and a channel is arranged in the middle of the lining pipe; the surface of the lead is sleeved with an insulating layer; the lead is arranged inside the groove; a waterproof breathable layer is sleeved on the outer side of the buffer layer; a protective layer is arranged on the surface of the waterproof breathable layer; the inner lining pipe is radially provided with heat dissipation holes; the heat dissipation holes are communicated with the channels and the grooves; the utility model provides an insulating power cable of crosslinked polyethylene can be to the inside and outside two-way heat dissipation of cable to improve the life of cable.

Description

Crosslinked polyethylene insulated power cable

Technical Field

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

Background

Typically a rope-like cable made up of several or groups of conductors (at least two in each group) twisted together, with the conductors of each group being insulated from one another and often twisted around a center, the entire outer surface being coated with a highly insulating coating. The cable has the characteristics of internal electrification and external insulation. The cable is used as a signal connecting line among various electrical appliances, instruments and automatic devices, is mainly used for various functions such as signal transmission, control signal transmission and the like in important occasions such as control and monitoring interlocking loops, protection lines and the like, and is widely applied to important economic fields such as various industrial and mining enterprises, traffic transportation and the like.

Along with the development of science and technology, current cable can lead to the cable to generate heat at the conductive in-process conductor because the conductor of self has certain resistance, and the high temperature probably leads to cable burning or short circuit etc. greatly increased the danger of using, and current cable heat dispersion is relatively poor, is difficult to avoid this kind of condition, leads to cost of maintenance higher, and life reduces.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides a crosslinked polyethylene insulated power cable.

The purpose of the utility model can be realized by the following technical scheme:

a crosslinked polyethylene insulated power cable comprising: the cable comprises a cable body, a lead, a lining pipe and a conduit;

the middle of the cable is provided with the lining pipe; a buffer layer is fixedly arranged on the outer side of the lining pipe; a groove is formed on one side, close to the buffer layer, of the lining pipe, and a channel is arranged in the middle of the lining pipe; the surface of the lead is sleeved with an insulating layer; the lead is arranged inside the groove; a waterproof breathable layer is sleeved on the outer side of the buffer layer; a protective layer is arranged on the surface of the waterproof breathable layer; the inner lining pipe is radially provided with heat dissipation holes; the heat dissipation holes are communicated with the channels and the grooves; the protective layer is fixedly provided with the guide pipe, and the guide pipe is in threaded connection with an end cover; the guide pipe is connected with the heat dissipation holes; the buffer layer is provided with a transition hole communicated with the waterproof breathable layer.

Further, the surface of the protective layer is provided with a bulge; the bulges are uniformly distributed on the surface of the protective layer; the bulges are provided with air vents which are communicated with the waterproof breathable layer; one end of the air guide hole, which is far away from the channel, is tapered, and the major diameter of the tapered end of the air guide hole faces to the channel.

Furthermore, a guide groove is formed in one side, close to the buffer layer, of the groove, and the section of the guide groove is in an isosceles trapezoid shape; the waist edges of the isosceles trapezoids are symmetrically distributed by taking the conducting wire as a center, and the lower bottoms of the isosceles trapezoids face the conducting wire; the lower bottom of the isosceles trapezoid is smaller than the upper bottom of the isosceles trapezoid.

Furthermore, an arc-shaped groove is formed in one end, close to the channel, of the groove and is connected with the channel; the arc-shaped groove is connected with the channel through a V-shaped connecting hole.

Further, the material of the insulating layer is crosslinked polyethylene.

The utility model has the beneficial effects that:

the crosslinked polyethylene insulated power cable can radiate heat inside and outside the cable in two directions, so that the service life of the cable is prolonged.

Drawings

The utility model will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic horizontal cross-section of the present application;

fig. 2 is a schematic transverse cross-section of the present application.

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 of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

As shown in fig. 1 and 2, a crosslinked polyethylene insulated power cable includes: a cable body, a lead 4, a lining pipe 1 and a conduit 10; an inner lining pipe 1 is arranged in the middle of the cable; a buffer layer 2 is fixedly arranged on the outer side of the lining pipe 1; a groove 3 is formed on one side of the lining pipe 1 close to the buffer layer 2, and a channel 8 is arranged in the middle of the lining pipe 1; the surface of the lead 4 is sleeved with an insulating layer 5; the lead 4 is arranged inside the groove 3; the outer side of the buffer layer 2 is sleeved with a waterproof breathable layer 6; a protective layer 7 is arranged on the surface of the waterproof breathable layer 6; the inner lining pipe 1 is radially provided with heat dissipation holes 9; the heat dissipation holes 9 are communicated with the channels 8 and the grooves 3; the protective layer 7 is fixedly provided with a conduit 10, and the conduit 10 is in threaded connection with an end cover; the conduit 10 is connected with the heat dissipation hole 9; the buffer layer 2 is provided with a transition hole communicated with the waterproof breathable layer 6; in actual processing, the lead 4 is wrapped by the insulating layer 5, then the guide is embedded into the clamping groove, and then the buffer layer 2, the waterproof breathable layer 6 and the protective layer 7 are sequentially wrapped; at the end of the use of the cable, the lining pipe 1 and the buffer layer 2 can well prevent the lead 4 from being crushed, and meanwhile, the waterproof breathable layer 6 is used for ventilation and heat dissipation; the protective layer 7 is used as a sheath to protect the whole body; in hot day, because the cable temperature is higher, waterproof ventilative layer 6 heat dissipation degree is not enough, can be through the end cover of opening both ends, make the one end and the air pump of pipe 10 be connected, one end and external connection or be connected with the control valve, the air pump is aerifyd pipe 10 like this, it is gaseous can convey to recess 3 through passageway 8, louvre 9, at last the pipe 10 discharge from the other end, the inside heat of cable is taken away through flowing to gaseous this in-process, the heat is also taken away from waterproof ventilative layer 6 of ability to partial gas simultaneously, thereby the life of cable has been improved.

In some implementations, the surface of the protective layer 7 is provided with protrusions 11; the bulges 11 are uniformly distributed on the surface of the protective layer 7; the bulge 11 is provided with air vents 12, and the air vents 12 are communicated with the waterproof breathable layer 6; the end of the air guide hole 12 far away from the channel 8 is tapered, and the major diameter of the tapered end of the air guide hole 12 faces the channel 8; in the process of industrial construction, a prefabricated site is required to be established, the cable is usually embedded in the ground in the prefabricated site, small broken stones inevitably exist when the cable is buried, at the moment, the sharp ends of the small broken stones are scratched or even embedded into the protective layer 7, and the protective layer 7 has a notch which is larger and larger when heavy vehicles such as trucks pass through the cable area along with the continuous construction; by arranging the protrusion 11 end, the direct contact between the broken stone and the protective layer 7 can be avoided; in addition, the gas guide holes 12 can discharge gas expanded at high temperature; at low temperature, the small diameter end of the air guide hole 12 can be contracted preferentially to the large diameter end, so that low-temperature air flow is prevented from entering the air guide hole 12 to influence the cable.

In some implementations, a guide groove is arranged on one side of the groove 3 close to the buffer layer 2, and the section of the guide groove is in an isosceles trapezoid shape; the waist edges of the isosceles trapezoid are symmetrically distributed by taking the lead 4 as a center, and the lower bottom of the isosceles trapezoid faces the lead 4; the lower bottom of the isosceles trapezoid is smaller than the upper bottom of the isosceles trapezoid; when the cable is processed, the wire 4 can be quickly pressed into the groove 3 along the guide groove, and the processing is convenient.

In some implementations, the end of the groove 3 near the channel 8 is provided with an arc-shaped slot 14, and the arc-shaped slot 14 is connected with the channel 8; the arc-shaped groove 14 is connected with the channel 8 through a V-shaped connecting hole 13; the above mechanism enlarges the air flow circulation at the end of the wire 4.

Further, the material of the insulating layer 5 is crosslinked polyethylene.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed.

Claims

1. A crosslinked polyethylene insulated power cable, comprising: a cable body, a lead (4), a lining pipe (1) and a conduit (10);

the middle of the cable is provided with the lining pipe (1); a buffer layer (2) is fixedly arranged on the outer side of the lining pipe (1); a groove (3) is formed on one side, close to the buffer layer (2), of the lining pipe (1), and a channel (8) is arranged in the middle of the lining pipe (1); the surface of the lead (4) is sleeved with an insulating layer (5); the wire (4) is arranged inside the groove (3); the outer side of the buffer layer (2) is sleeved with a waterproof breathable layer (6); a protective layer (7) is arranged on the surface of the waterproof breathable layer (6); the inner lining pipe (1) is radially provided with heat dissipation holes (9); the heat dissipation hole (9) is communicated with the channel (8) and the groove (3); the protective layer (7) is fixedly provided with the guide pipe (10), and the guide pipe (10) is in threaded connection with an end cover; the conduit (10) is connected with the heat dissipation hole (9); the buffer layer (2) is provided with transition holes communicated with the waterproof breathable layer (6).

2. A crosslinked polyethylene insulated electric power cable according to claim 1, characterized in that the surface of the protective layer (7) is provided with protrusions (11); the bulges (11) are uniformly distributed on the surface of the protective layer (7); the bulge (11) is provided with an air guide hole (12), and the air guide hole (12) is communicated with the waterproof breathable layer (6); the end of the air-guide hole (12) far away from the channel (8) is tapered, and the major diameter of the tapered end of the air-guide hole (12) faces the channel (8).

3. The cross-linked polyethylene insulated power cable according to claim 1, wherein a guide groove is provided at one side of the groove (3) close to the buffer layer (2), and the cross section of the guide groove is isosceles trapezoid; the waist edges of the isosceles trapezoid are symmetrically distributed by taking the lead (4) as a center, and the lower bottom of the isosceles trapezoid faces the lead (4); the lower bottom of the isosceles trapezoid is smaller than the upper bottom of the isosceles trapezoid.

4. A crosslinked polyethylene insulated power cable according to claim 2, characterized in that the end of the groove (3) near the channel (8) is provided with an arc-shaped slot (14), the arc-shaped slot (14) being connected with the channel (8); the arc-shaped groove (14) is connected with the channel (8) through a V-shaped connecting hole (13).

5. A crosslinked polyethylene insulated electric power cable according to claim 1, characterized in that the material of the insulating layer (5) is crosslinked polyethylene.