CN217280173U - Medium-voltage power cable for nuclear power station - Google Patents

Abstract

The utility model relates to the technical field of power cables, in particular to a medium-voltage power cable for a nuclear power station, which comprises a cable body, wherein the cable body is sequentially provided with a wear-resistant layer, a first insulating layer, a flame-retardant layer, a waterproof layer, a first buffer layer, an oxygen-isolating layer, a second insulating layer, a second buffer layer and a protective layer from inside to outside, a wire core is arranged inside the protective layer, a first heat-radiating channel is arranged inside the protective layer, a second heat-radiating channel is arranged inside the oxygen-isolating layer, and a third heat-radiating channel is arranged inside the flame-retardant layer, so that the utility model can effectively improve the wear-resistant, insulating, flame-retardant, waterproof, buffering and protecting performances of the cable body through the functions of the wear-resistant layer, the first insulating layer, the flame-retardant layer, the first buffer layer, the oxygen-isolating layer, the second insulating layer, the second buffer layer and the protective layer, therefore, the radiating effect of the cable body can be effectively improved.

Description

Medium-voltage power cable for nuclear power station

Technical Field

The utility model relates to a power cable technical field specifically is a middling pressure power cable for nuclear power station.

Background

The power cable is used for transmitting and distributing electric energy, is commonly used for urban underground power grids, power station leading-out lines, power supply in industrial and mining enterprises and transmission lines under river-crossing seawater, has a gradually increased proportion in the power line, is a cable product used for transmitting and distributing high-power electric energy in a trunk line of a power system, and comprises various insulated power cables with voltage grades of 1-500KV and above.

There are the following problems: the existing medium-voltage cable is mainly subjected to safety protection by the outermost layer of the cable, the outermost layer is in close contact with the cable monomer inside, so that the heat dissipation effect of the medium-voltage cable is poor, a light person easily causes the outer layer of the cable to be in a high-temperature state for a long time, the cable is easy to age, and a heavy person can easily catch fire at high temperature, so that personal or property safety is endangered.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a nuclear power station is with middling pressure power cable to solve the problem that proposes among the above-mentioned background art.

The technical scheme of the utility model is that: a medium-voltage power cable for a nuclear power station comprises a cable body, wherein the cable body sequentially comprises a wear-resistant layer, a first insulating layer, a flame-retardant layer, a waterproof layer, a first buffer layer, an oxygen-isolating layer, a second insulating layer, a second buffer layer and a protective layer from inside to outside, a wire core is arranged inside the protective layer, a first cavity is arranged between the flame-retardant layer and the waterproof layer, a second cavity is arranged between the oxygen-isolating layer and the second insulating layer, a plurality of first heat-dissipation channels are arranged in the protective layer at equal intervals, one end of each first heat-dissipation channel sequentially penetrates through the second buffer layer and the second insulating layer and extends into the second cavity, a plurality of second heat-dissipation channels are arranged in the oxygen-isolating layer at equal intervals, one end of each second heat-dissipation channel sequentially penetrates through the first buffer layer and the waterproof layer and extends into the second cavity, a plurality of third heat-dissipation channels are arranged in the flame-retardant layer at equal intervals, one end of each third heat dissipation channel penetrates through the first insulating layer in sequence and extends to the surface of the wear-resistant layer.

Furthermore, the wear-resistant layer is made of polyimide, the first insulating layer is made of rubber, and the flame-retardant layer is made of flame-retardant polyethylene.

Further, the waterproof layer is made by PA nylon materials, separate the oxygen layer and make by low smoke and zero halogen flame retardant polyolefin material.

Furthermore, the second insulating layer is made of cross-linked polyethylene, the first buffer layer and the second buffer layer are both made of rubber, and the protective layer is made of polyvinyl chloride.

Furthermore, the inside equidistant fixedly connected with a plurality of first stiffeners of second cavity room, the wearing layer surface is equipped with a plurality of bumps.

Further, the inside equidistant fixedly connected with a plurality of second stiffeners of first cavity room, equal fixedly connected with arc pole between every two adjacent second stiffeners.

The utility model discloses an improve and provide a middling pressure power cable for nuclear power station here, compare with prior art, have following improvement and advantage:

one is as follows: the utility model discloses a wearing layer, the first insulation layer, fire-retardant layer, the waterproof layer, first buffer layer, separate the oxygen layer, the second insulating layer, the effect of second buffer layer and protective layer, thereby can improve the wear-resisting of cable body effectively, it is insulating, fire-retardant, waterproof, buffering and protective properties, through a plurality of first heat dissipation channel, the effect of second heat dissipation channel and third heat dissipation channel, thereby can effectual realization improve the radiating effect of cable body, avoid the cable skin to be in the high temperature state for a long time and take place ageing.

The second step is as follows: the utility model discloses an effect of a plurality of first stiffeners, second stiffener and arc pole to can improve the structural strength of cable body effectively.

Drawings

The invention is further explained below with reference to the figures and examples:

fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a schematic cross-sectional structure diagram of the cable body of the present invention;

fig. 3 is an enlarged schematic view of fig. 3 a according to the present invention;

fig. 4 is a schematic view of the connection structure of the second reinforcing rod and the arc rod of the present invention.

Description of reference numerals:

1. a cable body; 2. a wear layer; 3. a first insulating layer; 4. a flame retardant layer; 5. a waterproof layer; 6. a first buffer layer; 7. an oxygen barrier layer; 8. a second insulating layer; 9. a second buffer layer; 10. a protective layer; 11. a first heat dissipation channel; 12. a second heat dissipation channel; 13. a third heat dissipation channel; 14. a second reinforcement bar; 15. an arcuate bar; 16. a first stiffener.

Detailed Description

The present invention will be described in detail below, and it is apparent that the technical solutions in the embodiments of the present invention are described clearly and completely. 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.

The utility model provides a medium-voltage power cable for a nuclear power station through improvement, as shown in figures 1-4, the medium-voltage power cable for the nuclear power station comprises a cable body 1, the cable body 1 sequentially comprises a wear-resistant layer 2, a first insulating layer 3, a flame-retardant layer 4, a waterproof layer 5, a first buffer layer 6, an oxygen-isolating layer 7, a second insulating layer 8, a second buffer layer 9 and a protective layer 10 from inside to outside, a wire core is arranged inside the protective layer 10, a first cavity chamber is arranged between the flame-retardant layer 4 and the waterproof layer 5, a second cavity chamber is arranged between the oxygen-isolating layer 7 and the second insulating layer 8, a plurality of first heat-dissipating channels 11 are equidistantly arranged inside the protective layer 10, one end of each first heat-dissipating channel 11 sequentially penetrates through the second buffer layer 9 and the second insulating layer 8 and extends into the second cavity chamber, a plurality of second heat-dissipating channels 12 are equidistantly arranged inside the oxygen-isolating layer 7, one end of each second heat dissipation channel 12 sequentially penetrates through the first buffer layer 6 and the waterproof layer 5 and extends into the second cavity chamber, a plurality of third heat dissipation channels 13 are arranged in the flame retardant layer 4 at equal intervals, one end of each third heat dissipation channel 13 sequentially penetrates through the first insulating layer 3 and extends to the surface of the wear-resistant layer 2, through the functions of the wear-resistant layer 2, the first insulating layer 3, the flame-retardant layer 4, the waterproof layer 5, the first buffer layer 6, the oxygen barrier layer 7, the second insulating layer 8, the second buffer layer 9 and the protective layer 10, thereby effectively improving the wear-resisting, insulating, flame-retardant, waterproof, buffering and protecting performances of the cable body 1, by the action of the plurality of first heat dissipation channels 11, second heat dissipation channels 12 and third heat dissipation channels 13, therefore, the heat dissipation effect of the cable body 1 can be effectively improved, and the outer layer of the cable is prevented from being aged when being in a high-temperature state for a long time.

Further, in the above technical solution, the wear-resistant layer 2 is made of polyimide, the first insulating layer 3 is made of rubber, and the flame-retardant layer 4 is made of flame-retardant polyethylene.

Further, in the above technical scheme, the waterproof layer 5 is made of a PA nylon material, and the oxygen barrier layer 7 is made of a low-smoke halogen-free flame-retardant polyolefin material.

Further, in the above technical solution, the second insulating layer 8 is made of cross-linked polyethylene, the first buffer layer 6 and the second buffer layer 9 are both made of rubber, and the protective layer 10 is made of polyvinyl chloride.

Further, in above-mentioned technical scheme, a plurality of first stiffeners 16 of equidistant fixedly connected with in the inside of second cavity, 2 surfaces on wearing layer are equipped with a plurality of bumps, a plurality of second stiffeners 14 of equidistant fixedly connected with in the inside of first cavity, equal fixedly connected with arc pole 15 between every two adjacent second stiffeners 14, through the effect of a plurality of first stiffeners 16, second stiffeners 14 and arc pole 15 to can improve cable body 1's structural strength effectively.

The working principle is as follows: the utility model discloses a wear-resisting layer 2 made by polyimide material, the first insulating layer 3 made by rubber material, fire-retardant layer 4 made by fire-retardant polyethylene material, the waterproof layer 5 made by PA nylon material, the first buffer layer 6 made by rubber material, the oxygen barrier layer 7 made by low smoke zero halogen fire-retardant polyolefin material, the second insulating layer 8 made by cross-linked polyethylene material, the second buffer layer 9 made by rubber material and the protective layer 10 made by polyvinyl chloride material, thus can effectively improve the wear-resisting, insulating, fire-retardant, waterproof, buffering and protective properties of the cable body 1, through the effect of a plurality of first heat dissipation channels 11, the second heat dissipation channel 12 and the third heat dissipation channel 13, thereby can effectively realize the improvement of the heat dissipation effect of the cable body 1, avoid the outer layer of the cable from aging in a high temperature state for a long time, through the effect of the plurality of first reinforcing bars 16, the second reinforcing bars 14 and the arc-shaped bars 15, the structural strength of the cable body 1 can be effectively improved.

The previous description is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (6)

1. A medium voltage power cable for a nuclear power plant, characterized in that: comprises a cable body (1), the cable body (1) is sequentially composed of a wear-resistant layer (2), a first insulating layer (3), a flame-retardant layer (4), a waterproof layer (5), a first buffer layer (6), an oxygen-isolating layer (7), a second insulating layer (8), a second buffer layer (9) and a protective layer (10) from inside to outside, a wire core is arranged inside the protective layer (10), a first cavity chamber is arranged between the flame-retardant layer (4) and the waterproof layer (5), a second cavity chamber is arranged between the oxygen-isolating layer (7) and the second insulating layer (8), a plurality of first heat-radiating channels (11) are equidistantly arranged inside the protective layer (10), one end of each first heat-radiating channel (11) sequentially penetrates through the second buffer layer (9) and the second insulating layer (8) to extend into the second cavity chamber, a plurality of second heat-radiating channels (12) are equidistantly arranged inside the oxygen-isolating layer (7), every the one end of second heat dissipation channel (12) all runs through first buffer layer (6) and waterproof layer (5) in proper order and extends to in the second cavity chamber, a plurality of third heat dissipation channel (13), every have been seted up to the inside equidistant of fire-retardant layer (4) the one end of third heat dissipation channel (13) all runs through first insulation layer (3) in proper order and extends to wearing layer (2) surface.

2. A medium voltage power cable for nuclear power plants according to claim 1, characterized in that: the wear-resistant layer (2) is made of polyimide, the first insulating layer (3) is made of rubber, and the flame-retardant layer (4) is made of flame-retardant polyethylene.

3. A medium voltage power cable for nuclear power plants according to claim 1, characterized in that: the waterproof layer (5) is made of PA nylon material, and the oxygen isolation layer (7) is made of low-smoke halogen-free flame-retardant polyolefin material.

4. A medium voltage power cable for nuclear power plants according to claim 1, characterized in that: the second insulating layer (8) is made of cross-linked polyethylene, the first buffer layer (6) and the second buffer layer (9) are made of rubber, and the protective layer (10) is made of polyvinyl chloride.

5. A medium voltage power cable for nuclear power plants according to claim 1, characterized in that: the inside equidistant fixedly connected with of second cavity room has a plurality of first stiffeners (16), wearing layer (2) surface is equipped with a plurality of bumps.

6. A medium voltage power cable for nuclear power plants according to claim 1, characterized in that: the equidistant fixedly connected with a plurality of second stiffeners (14) of inside of first cavity room, equal fixedly connected with arc pole (15) between every two adjacent second stiffeners (14).

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