CN210403325U

CN210403325U - Power cable with bridging function

Info

Publication number: CN210403325U
Application number: CN201822255757.1U
Authority: CN
Inventors: 刘永伟; 贺云芳; 马建平; 张镇球
Original assignee: Wuxi New Sunshine Cable Co ltd
Current assignee: Wuxi New Sunshine Cable Co ltd
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2020-04-24
Anticipated expiration: 2028-12-29

Abstract

The utility model discloses a power cable with bridging function, including the bridging support, the internally mounted of bridging support has the power cable body, the one end of power cable body is provided with the bridging end, be provided with anticorrosive protection film on the outer wall of power cable body, be provided with fire-retardant polyvinyl fluoride sheath on anticorrosive protection film's the inner wall, be provided with fireproof cotton on the inner wall of fire-retardant polyvinyl fluoride sheath, be provided with the steel wire area on the cotton inner wall of fireproof, be provided with on the inner wall in steel wire area and separate the oxygen filler, the inside that separates the oxygen filler is provided with the inclusion, one side in inclusion is provided with the copper core conductor, be provided with the isolation layer on the outer wall of copper core conductor, be provided with the inner sheath on the outer wall of isolation layer. The utility model discloses a setting up the bridging support, making power cable can bridge, and power cable is inside to be provided with multiple fire resistive construction, and anti flame retardant property is strong.

Description

Power cable with bridging function

Technical Field

The utility model relates to a power cable technical field specifically is a power cable with bridging function.

Background

The power cable is used for transmitting and distributing electric energy and is commonly used for urban underground power grids, leading-out lines of power stations, internal power supply of industrial and mining enterprises and underwater power transmission lines crossing rivers and sea. In a power line, the proportion of the cable is gradually increasing, the power cable is a cable product used for transmitting and distributing high-power electric energy in a main line of a power system, and comprises various voltage grades of 1-500 KV and above, and various insulated power cables, the power cable is generally a cable similar to a rope formed by twisting at least two stranded wires of each group of several or groups of wires, the wires of each group are mutually insulated and are usually twisted around a center, a high-insulation covering layer is wrapped outside the whole cable, the types of the cables are various, and the cable can be applied to different use environments in different fields, so that different requirements are also made on the cables.

However, the existing power cable is mostly used for transmitting high-power electric energy, and once a fire disaster occurs, the loss is large; therefore, the existing requirements are not met, for which we propose a power cable with bridging function.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a power cable with bridging function to solve the current power cable that provides among the above-mentioned background art and be used for transmitting high-power electric energy more, in case take place the great problem of fire hazard loss.

In order to achieve the above object, the utility model provides a following technical scheme: a power cable with a bridging function comprises a bridging support, wherein a power cable body is installed inside the bridging support, bridging ends are arranged at two ends of the power cable body, an anti-corrosion protective film is arranged on the outer wall of the power cable body, a flame-retardant polyvinyl fluoride sheath is arranged on the inner wall of the anti-corrosion protective film, fireproof cotton is arranged on the inner wall of the flame-retardant polyvinyl fluoride sheath, a steel wire belt is arranged on the inner wall of the fireproof cotton, an oxygen-insulating filler is arranged on the inner wall of the steel wire belt, inclusions are arranged inside the oxygen-insulating filler, a copper core conductor is arranged on one side of the inclusions, an isolation layer is arranged on the outer wall of the copper core conductor, an inner sheath is arranged on the outer wall of the isolation layer, a water-resisting tape is arranged on the inner wall of the inner sheath, and a carbon powder layer is arranged on the inner wall, an insulator is arranged inside the carbon powder layer, and a shielding layer is arranged on the inner wall of the insulator.

Preferably, the flame-retardant polyvinyl fluoride protective sleeve is arranged between the corrosion-resistant protective film and the fireproof cotton.

Preferably, the number of the copper core conductors and the number of the inclusions are three.

Preferably, the shielding layer is disposed between the insulator and the copper core conductor.

Preferably, the water-stop strip is arranged between the inner sheath and the carbon powder layer.

Preferably, the power cable body is provided with a plurality of, and a plurality of power cable body passes through strapping fixed connection.

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

1. the utility model discloses a set up fire-retardant polyvinyl fluoride sheath, fire prevention cotton and separate the oxygen filler in power cable's inside, three kinds of structures all have fire-retardant function, and stopped the risk of the inside spontaneous combustion of power cable, can effectively prevent stretching of intensity of a fire under the conflagration condition, limit the burning in local range, keep other equipment.

2. When a plurality of cables are used in parallel during bridging, the cables are fixed through the binding tapes 3, so that the sectional area of a conductor can be increased, the resistance of a loop is reduced, the voltage and power loss of the loop is reduced, and the current-carrying capacity is increased.

Drawings

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

fig. 2 is a schematic view of the internal structure of the power cable of the present invention;

FIG. 3 is a partial enlarged view of the point A of the present invention;

in the figure: 1. a bridging bracket; 2. a power cable body; 3. a strapping tape; 4. a bridge connection end; 5. a corrosion-resistant protective film; 6. a flame-retardant polyvinyl fluoride sheath; 7. fireproof cotton; 8. a steel wire belt; 9. an oxygen barrier filler; 10. impurities; 11. a copper-core conductor; 12. an isolation layer; 121. an inner sheath; 122. a water-stop strip; 123. a carbon powder layer; 124. an insulator; 125. and a shielding 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.

Referring to fig. 1-3, the present invention provides an embodiment: a power cable with a bridging function comprises a bridging bracket 1, wherein the bridging bracket 1 plays a role of fixing the power cable, a power cable body 2 is arranged inside the bridging bracket 1, bridging ends 4 are arranged at two ends of the power cable body 2, an anti-corrosion protective film 5 is arranged on the outer wall of the power cable body 2, the anti-corrosion protective film 5 plays a role of slowing down the aging speed of the power cable, a flame-retardant polyvinyl fluoride sheath 6 is arranged on the inner wall of the anti-corrosion protective film 5, the flame-retardant polyvinyl fluoride sheath 6 plays a role of insulation and flame retardance, fireproof cotton 7 is arranged on the inner wall of the flame-retardant polyvinyl fluoride sheath 6, the fireproof cotton 7 plays a role of heat insulation and fire prevention, a steel wire belt 8 is arranged on the inner wall of the fireproof cotton 7, the steel wire belt 8 improves the tensile and pressure resistance of the cable, an oxygen-isolating filler 9 is arranged on the inner wall of the steel wire belt 8, and the, the risk of spontaneous combustion of the cable from the inside is stopped, the inside of oxygen-insulating filler 9 is provided with inclusion 10, one side of inclusion 10 is provided with copper core conductor 11, be provided with isolation layer 12 on the outer wall of copper core conductor 11, be provided with inner sheath 121 on the outer wall of isolation layer 12, be provided with water-stop strip 122 on the inner wall of inner sheath 121, be provided with carbon powder layer 123 on the inner wall of water-stop strip 122, the inside of carbon powder layer 123 is provided with insulator 124, be provided with shielding layer 125 on the inner wall of insulator 124.

Further, the flame-retardant polyvinyl fluoride sheath 6 is arranged between the anti-corrosion protective film 5 and the fireproof cotton 7, the flame-retardant polyvinyl fluoride sheath 6 has insulation and flame-retardant effects, the anti-corrosion protective film 5 on the outer wall of the flame-retardant polyvinyl fluoride sheath 6 can effectively slow down the aging speed of the power cable, and the fireproof cotton 7 on the inner wall of the flame-retardant polyvinyl fluoride sheath 6 can play a role in heat insulation and fire prevention.

Further, copper core conductor 11 and inclusion 10 all are provided with threely, and three inclusion 10 can fill the vacancy space of power cable inside, reaches the effect of extrusion fixed copper core conductor 11, and copper core conductor 11 is provided with threely, can improve power cable's circular telegram efficiency.

Further, the shielding layer 125 is disposed between the insulator 124 and the copper-core conductor 11, and the shielding layer 125 is equipotential to the copper-core conductor 11 and in good contact with the insulator 124, thereby preventing partial discharge from occurring between the copper-core conductor 11 and the insulator 124.

Further, between sheath 121 and carbon powder layer 123 including water-stop strip 122 sets up, water-stop strip 122 has played waterproof effect, avoids insulator 124 to receive damp influence insulating effect, and inner sheath 121 on the water-stop strip 122 outer wall has played the effect of protection isolation layer 12 inner structure, and carbon powder layer 123 on the water-stop strip 122 inner wall can improve power cable's interference killing feature, makes current transmission more stable.

Further, power cable body 2 is provided with a plurality of, and a plurality of power cable body 2 passes through strapping 3 fixed connection, connects many cables in parallel and uses the sectional area that can increase the conductor, reduces the resistance in return circuit, reduces the loss of the voltage and the power in return circuit to increase the carrying capacity.

The working principle is as follows: when in use, the power cable body 2 is installed and fixed inside the bridging bracket 1, the bridging ends 4 are arranged at the two ends of the power cable body 2 for bridging, the flame-retardant polyvinyl fluoride sheath 6, the fireproof cotton 7 and the oxygen-insulating filler 9 are arranged inside the cable, the flame-retardant polyvinyl fluoride sheath 6 can play an insulating effect and has excellent flame-retardant performance, the fireproof cotton 7 enhances the heat-insulating and fireproof functions of the power cable, the oxygen-insulating filler 9 inside the fireproof cotton 7 discharges oxygen inside the power cable, the risk of spontaneous combustion inside the power cable is avoided, triple flame retardance can prevent the spread of fire under the condition of fire, the combustion is limited in a local range and other equipment is kept, the carbon powder layer 123 is also arranged inside the power cable, the anti-interference performance of the power cable can be improved, the interference of the carbon powder layer to other power cables is reduced, and a plurality of cables are used in parallel connection when in bridging, the cables are fixed through the binding belt 3, so that the sectional area of the conductor can be increased, the resistance of a loop is reduced, the voltage and power loss of the loop is reduced, and the current-carrying capacity is increased.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A power cable with bridging function, comprising a bridging bracket (1), characterized in that: a power cable body (2) is arranged inside the bridging bracket (1), bridging ends (4) are arranged at two ends of the power cable body (2), an anti-corrosion protective film (5) is arranged on the outer wall of the power cable body (2), a flame-retardant polyvinyl fluoride sheath (6) is arranged on the inner wall of the anti-corrosion protective film (5), fireproof cotton (7) is arranged on the inner wall of the flame-retardant polyvinyl fluoride sheath (6), a steel wire belt (8) is arranged on the inner wall of the fireproof cotton (7), an oxygen-insulating filler (9) is arranged on the inner wall of the steel wire belt (8), inclusions (10) are arranged inside the oxygen-insulating filler (9), a copper core conductor (11) is arranged on one side of each inclusion (10), an isolation layer (12) is arranged on the outer wall of the copper core conductor (11), and an inner sheath (121) is arranged on the outer wall of the isolation layer (12), be provided with water-stop strip (122) on the inner wall of inner sheath (121), be provided with carbon powder layer (123) on the inner wall of water-stop strip (122), the inside of carbon powder layer (123) is provided with insulator (124), be provided with shielding layer (125) on the inner wall of insulator (124).

2. A power cable with bridging function according to claim 1, characterized in that: the flame-retardant polyvinyl fluoride sheath (6) is arranged between the corrosion-resistant protective film (5) and the fireproof cotton (7).

3. A power cable with bridging function according to claim 1, characterized in that: the number of the copper core conductors (11) and the number of the inclusions (10) are three.

4. A power cable with bridging function according to claim 1, characterized in that: the shielding layer (125) is disposed between the insulator (124) and the copper core conductor (11).

5. A power cable with bridging function according to claim 1, characterized in that: the waterproof tape (122) is arranged between the inner sheath (121) and the carbon powder layer (123).

6. A power cable with bridging function according to claim 1, characterized in that: the power cable body (2) is provided with a plurality of, and a plurality of power cable body (2) passes through strapping (3) fixed connection.